Hey guys, after quite a long time I'm back with another chapter. I was really busy with college and also fell sick so I couldn't write for over 2 weeks. But don't worry, I'll be continuing this story for a decent number of chapters and won't be dropping it anytime soon. Although you may see me take this amount of time for newer chapters. Without further ado, please enjoy!

Chapter 4: Fitness Lessons

It was still morning when Naruto had arrived at the Hokage's residence. He stared down the red structure before he entered the gates and ascended the stairs. This time, the Anbu guards immediately made way when they saw him as if they were expecting him.

Outside The Main Office

He took a deep breath, thinking back to the invitation he received from Tsunade. 'Did she invite me seriously or was she just joking?' he hesitated behind the closed door confused about the situation. 'One thing's for sure, I definitely can't let her catch me staring' he remembered the people that Tsunade sent to the infirmary.

As he was turned away lost in thought, the door opened in front of him. "Naruto?" a female voice enquired. "What are you doing here?" he turned towards the voice to see Shizune standing in the doorway, holding the famous pet pig. She was the niece of Tsunade's former lover Dan, who died during the Second Great Ninja War.

"Oh, hey Shizune" he greeted her. "Um, Tsunade had asked me to come" he was confused as he thought that she would know why he was here. "I'm supposed to be joini-" he was interrupted before he could finish speaking by a loud shout from far behind Shizune.

"I asked him to come" shouted the Hokage, who was seated behind her desk on a chair. "I wanted some workout tips from the world's strongest ninja. Maybe I could find ways to improve my strength" she smiled. The thought of her monster strength increasing made both Shizune and Naruto shudder.

"Umm, try not to help her too much" Shizune whispered to Naruto out of fear, thinking about her drunken rage becoming a bigger problem.

"What was that!" Tsunade's brow was raised with annoyance at them talking about her.

"I-It's nothing. I need to attend to some work immediately. See you later" she scurried past Naruto. "You too Naruto" she said as she made her way out of sight.

"Sigh, that damn girl" Tsunade mumbled to herself. She then turned her eyes to the object of her interest. "Well you sure took your time getting here. You didn't show up yesterday and kept me waiting" she stood up from her seat. "Maybe you aren't interested in exercising with me?" she put her hands on her hip.

"O-Of course I am" he replied thinking that his opportunity was going away. "I was really busy yesterday but I kept everything else aside to be here today" he claimed, although he actually had no other plans.

"Oh my, so you made yourself free just to spend time with me. I'm flattered" she smiled. "In that case, let's get on with our plans. Hmmm..." she looked at him and started thinking. "Well you won't be able to stretch in your current outfit. Why don't you change into those?" she pointed to some neatly folded gym shorts. "I had them ready since you said you were coming."

"Sure" he responded looking at the lone pair of shorts on the table. "But are we gonna do it here?" he noticed the yoga mats rolled at the corner of the room.

"That's right. We have a lot of space here, so why not?" she replied. "We'll also get complete privacy" she gave a sly smile. "Alright, meet me back here in around 20 minutes. I'm gonna finish up some work and set things up" she informed him.

"Alright. In the meantime, I'll have a look around."

He left the office and strolled the building for a while, checking out the rooms with the fancy new equipment and testing some things out. After some time, he decided to get changed.

'I guess I'll have to keep my t-shirt on since she only gave me pants' he decided looking at the clothes he was given. He went to the washroom and changed into the tight but very stretchable yoga shorts.

At The Scheduled Time

He made his way back to the office embarrassed to be in shorts and knocked on the door once again. "I'm back" he shouted from outside hoping he could enter quickly.

"Come on in, and lock the door behind you" the blonde responded. As Naruto entered and shut the door, she added "We wouldn't want anyone else to interrupt, now would we?"

Tsunade had just finished setting up the mats and had already started warming up. Naruto locked the door and turned around before having his jaw dropped. Naruto wasn't the only one who had changed into suitable clothes.

Stretching in front of him on all fours, was the gorgeous MILF Hokage. She was wearing a dark grey crop top which appeared like a bra due to the size of her humongous tits. It revealed to him a large portion of her cleavage from the top. Coupled with her tight and stretchy long black yoga pants, which showed a perfect impression of her ass.

"..." Naruto seemed to find himself in these types of situations pretty often the past couple of days. Except he was confident that it would be different this time, since in front of him was the freaking Hokage!

"Why don't you finish changing and let's begin" Tsunade smiled as she noticed him blushing, arching her butt high.

"H-Huh what do you mean? I changed into the shorts" he responded as he kept his eyes fixed on her.

"What about your t-shirt? You may tear it if you stretch in that" she smiled devilishly. "Why don't you take it off? No one's here to see you anyway."

"Umm, if that's alright with you, then sure" he didn't think much of just being shirtless and proceeded to take it off. The sight of his perfectly built upper body left the busty blonde in awe.

"It's more than alright" she bit her lips while holding her pose. "Just follow what I'm doing" she added. 'I really want to feel those muscles up close. Mmmh, so well toned and perfectly shaped. Considering the dense guy they belong to, as long as I can act well enough...'

Tsunade had decided to lay out a single large yoga mat instead of separate ones so that she could move him around wherever she wanted. That worked out well for both of their motives. There was also a big mirror a short distance in front of her. She claimed that it was to observe her form while she stretched.

The shirtless Uzumaki decided to lay parallel to her around 2 meters away and followed her movements. He immediately regretted wearing stretchable shorts after watching the curvy MILF. With her butt arched and her boobs spilling out of her undersized top, no one could blame him for getting aroused.

The longer they went on, the harder it was to control his approaching boner. To take his mind off of that body, he asked "So, umm, Hinata keeps bugging me about doing yoga with her too, y'know."

"Ohhh, is that so" she too snapped away from staring his body down from the reflection on the mirror. "In that case, you should join me more often so you can learn everything thoroughly."

"Yeah this isn't too bad" he wouldn't mind staring at her body more often. "Oh yeah, she mainly wants to do...umm" he paused for a second. "That's right, she called it couple's yoga" he recalled the name. "Maybe you could explain that to me too?"

"Huh" Tsunade was surprised about what she heard before realizing that the dim but hot Uzumaki had no idea what he was asking about. Her eyes then lit up 'Wait, this is my chance. I'll make sure you won't ever forget what it is, hehe' she devised in her mind.

"That won't work" she composed herself. "Yoga requires demonstration and couple's yoga more than normal. Plus, knowing you, you'll forget everything I explain to you. So, how about I teach you?"

"Uh, sure if you're willing to" Naruto was relieved that he didn't need to rack his brain.

"You'll be able to do this with Hinata in no time. It's really easy with a good partner. Consider yourself lucky to have me" she smirked widely. "So come on over here" she signaled him to come towards her.

"Umm, ok" he was confused as to what they had to do. He stood awkwardly next to her and awaited her instructions. The blonde babe actually didn't know too many exercises but couldn't miss this opportunity.

She got back to her feet and walked behind him. "Ok, so for these exercises, you and your partner need to rely on each other to really feel the effect" she stood close to him. "So, before we do that, why don't we help each other with the normal poses" she suggested pressing her huge boobs against his back.

"Y-yeah alright" Naruto realized that his current situation was even worse for containing his boner.

"So firstly, we need to get our joints loose" she caught both his arms from behind and pressing against him, stretched them wide. She moved the sideways and upwards, alternating every few seconds. After which, she led him to do various other normal stretches with her body feeling his bare back, more accurately her massive tits.

Naruto could barely control it anymore and wanted to hide his hardening erection. "Alright, that was pretty nice. But I feel like I'm taking up your workout time, so how about you do the poses instead" he hoped that he could sit down quickly.

"Hmmm?" she was confused for a minute before she noticed he was red once again. 'Oh I see how it is. Hehe, I can't really blame him, feeling my tits all this time but I'm not letting him go that easily' she pondered a moment. 'Knowing him, as long as I act oblivious, there won't be a problem' her thoughts were fueled with lust. In her mind, the Uzumaki boy was just a innocent kid. She had no idea that he was getting naughty with women other than his wife.

"Oh that's really sweet of you" Tsunade responded "In that case, could you help me do the poses?" she requested of him keeping a straight face. She made sure to look away from him so that he wouldn't be uncomfortable. "That would also help you learn first hand."

Naruto didn't really have a choice thinking that she would be suspicious if he refused. "Of course I'll help" he said immediately moving past her and facing away from the mirror.

"For now, just help me with my form and support me from behind. You can also try and learn with me" she backed herself against him. "This is the basic stuff so don't bother telling Hinata about these" she said not wanting his wife to confront her. "First, check out my breathing" she caught his arms and wrapped them around her abdomen pressing the underneath of her breasts. All so she could feel that sturdy body of his up close holding her tight.

Naruto tried keeping his lower body away as he gripped her body. "I see" he said having no idea what she wanted him to check.

'As I thought, he really is a naive little boy. I don't know how he can be so hot yet so cute. Trying to keep his pants from poking into me, does he think I'm a child' she thought as she got ready to move. 'Let's see if you're packed as well as you're built' she grinned.

"Now follow my movements" she claimed excitedly as she started lowering her fat butt while keeping her feet in place. The poor boy's boner which almost calmed down, once again started rising as he felt her ass coming towards it. He was trying his best to keep it away, but the busty babe did the opposite closing the distance as she squatted up and down. Every time she squatted down, he felt the soft and massive tits falling over his arms. Until the full size of his erection could no longer be kept out of reach.

'Oh my God! Now that is more than I expected' she stopped, shocked as that was only the tip which hit into her. Naruto's heart dropped when she stopped thinking that it was the end for him. 'You can't get away from me now' the seductress thought as she decided to change pose.

"Oh, I must have left a scroll in those pants but it's fine. Gives me some very nice support" she smirked as she informed him about the change in position.

"Umm, y-yeah I thought it might be something important so I didn't want to risk losing it" Naruto was relieved that he wasn't knocked out by the violent kunoichi. "I guess I learnt from the last time I messed around with a scroll" he nervously chuckled as he recalled when he stole the forbidden scroll. Tsunade was actually kind of impressed that he could lie so calmly despite the situation.

She began getting on all fours with her knees and palms on the mat into a table like position. A position which looked similar to the famous doggy style pose. 'Seems he's not ready to part with me anytime soon' she was happy that he didn't wimp out. 'So, let's keep it going' she was exhilarated to feel a man's junk after many years of tiring work as Hokage, specifically one so young, hot and well-endowed.

"This one's called the Cat Pose" she informed him as she put back her butt all the way into the rock hard dick behind her. "Now hold me tightly and keep me supported so I can really stretch" Naruto hesitated as had no choice. He held her hips firmly, while the tip of his clothed and stretched out erection grazed her ass multiple times.

"Ungh" Naruto let out a slight moan which he prayed that she didn't hear. "Like this" he mumbled trying to cover up his slip-up. 'Seems like she hasn't noticed yet or I would be dead. Well, I don't really have a choice so it's all or nothing. Might as well enjoy it while it lasts' he tried to convince himself to also act naturally no matter what. As long as none of them spoke of it, both of them felt that the other was unaware of the situation.

As he thought this, he mustered up the courage to push his dick forward right over the outline between both her plump cheeks. The busty MILF was stunned as she didn't expect the assumed gullible boy to act so freely. "Is this much support fine? Or should I give you some space?'

'Ooooh! Bold move, little brat. Seems like you too are gonna act ignorant as long as I keep my mouth shut.' she hid a lustful demeanor and could see his lust fueled eyes in the mirror. 'Mmmn, I don't mind feigning ignorance for that thing' she thought.

"Yup that's perfect. You're alignment is just right for this pose" she encouraged him as she pressed her ass back even more. "Once you are at this point, you need to take deep breaths. So inhale..." she moved her head upwards, bring her ass forwards with her breath making his dick slide away from the pants. "Then exhale..." she moved her ass back sliding his dick fully over her backdoor.

Naruto actually thought that Tsunade was unaware since he had seen Hinata doing the current exercise before, besides using someone's support of course. But he had resolved to not care since he couldn't change anything now. So, he made sure to completely enjoy the frictionless sensation of his covered boner giving the Hokage a dry assjob. His precum wetted the pant so the sliding was smoother.

"You need to ... unhh ... gradually breathe faster as you go on" she panted as she moved her hips oscillating back and forth. As Naruto got close to finishing, he too moved his dick along, guided by the motion of the hot ass in front of him.

"Yeah, I can really feel my ... ungh ... chakra surging" he breathed quickly as his dick was at it's largest.

'Angggg' her mind was screaming as she heard his cute cover up while sliding on the thickest meat she had ever felt. She picked up the pace until at last she went forward, separating her butt from his dick and raised her ass a bit, before slamming it back. She placed it such that Naruto's clothed cock poked right into the busty blonde's asshole covered in her hot yoga pants.

"Unghh" Tsunade moaned as she saw the reflection of his bright red face in the mirror and finally felt a preview of his massive package. Feeling his dick's tip poke right through into her asshole caused Naruto to pull back causing him to cum. His semen oozed right through his breathable shorts and fell onto the MILF's yoga pants.

"Huff, and that's how it's done. Don't you forget it" she looked downwards hiding her excitement from getting dry humped.

"I'll, umm, definitely remember" Naruto now realized that there was no way she didn't feel that. 'Wow, I got to cum over Tsunade's sexy ass' he was thrilled at the notion. He then looked down to see Tsunade's pants getting a slight tear where his dick had poked. 'Seems like she won't say anything. Well, if we can keep doing this, neither will I' Naruto decided to make no mention about the obvious.

"That's a good boy" Tsunade smiled as she rose back to her feet.

"If I keep practicing, I'll definitely join Hinata in no time" he said nervously to test his hypothesis of whether she wanted to continue.

'Oh, seems like he's getting braver' the Hokage concluded, knowing what he wanted. 'Is this really fine? He already has a wife' she pondered before thinking 'Screw It, if he's fine with it, why shouldn't I be. Also, as long as we don't actually fuck, I don't see any issue'

"That's right, so make sure you don't miss this. I'll be here in the mornings, so we can work out together" she gave in as she got wet from just feeling his cock earlier. She turned around to the shirtless boy, who's boner was now calm.

"With you teaching me, I wouldn't miss it" he gave a charming smile which made the Senju's lust go wilder. "Although, depending on Hinata, I may not make it sometimes."

'Such a cute boy, I want to gobble you up!' she thought before calming herself. "That's fine. Just let me know and I'll set things up" she grinned seductively stretching to protrude her sweaty breasts with her hard nipples poking against her top. "Alright, I worked up enough of a sweat for today. Why don't we stop for today?" she needed him to leave soon or she wouldn't be able to control herself.

"Of course, you must be busy" Naruto responded enjoying the wonderful sight.

"You can keep the pants. But sure to leave the scroll, it's important" she smiled flirtatiously.

"Sure" Naruto replied with an innocent face before making his way.

Tsunade locked the door after he left. 'I should take my time. We have a lot of time to play with' she thought as she began taking off her clothes and started touching herself.

End Of Chapter 4

Thanks for reading. I know it wasn't much after the long wait but hope to get more out and keep improving. Please leave a review and let me know if you like it.

Plan moving forward: Currently, I don't plan on introducing any new girls for the next 2-3 chapters and want to focus on the current girls - Hanabi, Ino and Tsunade. Will focus on developing their love/lust and how to get around Hinata finding out, so the teasing will probably go down after this. The next girl will probably come after Naruto loses his virginity with one of the current girls who I've not yet decided.

That's all. Until next time!