Willow was taking her training seriously. Thanks to her formal Huntress training when she was younger, Willow adapted to Jaune's training at a rapid pace.
Jaune loved this part about Willow. She can adapt when she needs to. Unfortunately, depression, due to her marriage, locked this part of her, but it unlocked once more thanks to Jaune.
"Again!" Jaune said. He then smacked Willow, who was blindfolded, in the thigh. "Again!".
Jaune was teaching Willow to use her sense of danger to dodge the hits. This is so that her body could automatically dodge unconsciously when it feels threatened even without Willow's notice. (Think spider-sense).
This training was happening alongside R.W.B.Y.J. the second. Weiss, who looked at her mother's counterpart being trained by Jaune, was having a hard time watching. Willow would get smacked in different areas of her body with enough force for her to kneel each time. What R.W.B.Y.J. the second didn't know is that this form of training is still light, something they would go through as well.
"Oh, damn!" Yang-II said. "Jaune isn't showing mercy to your mother's counterpart. I think each of the areas that have been hit would bruise".
"If you have time to talk, you have enough free time for me to increase the difficulty of your training," Scáthach said. "Well then, I guess I'll double all your regime starting now".
R.W.B.J. the second glared at Yang-II. The training they were going through was difficult enough that they barely had time to breathe and rest. But thanks to Yang-II, it would be doubled.
"Why, Yang?! Why!" Ruby-II complained. "Why couldn't you leave commenting on things later!".
"I'm sorry!" Yang-II said. "I didn't think she would make our training more difficult!".
"Really? Scáthach clearly said that if she saw us being chitty-chatty, she would increase our training," Weiss-II said. "Why would you think otherwise? When she did this before".
"I'm really sorry!" Yang-II said. "I won't do it again".
Back with Willow and Jaune, the training has been going for an hour now, and Willow was getting exhausted. She was disappointed in herself. Willow may have adapted to training with Jaune at a rapid pace. However, due to her being older and having stopped her training for a long time and being an alcoholic, Willow didn't have much stamina and endurance. She would run out of breath quickly. Jaune saw that Willow seemed to be disappointed in herself, and he went to comfort her.
"Hey, why are you looking down?" Jaune asked. "You're doing great! When Scáthach first trained Weiss, she took a month to get used to this intense training, but you didn't. That's amazing in my books".
"Thanks for the compliment, Jaune," Willow said. This training made her realise that she was far older than Jaune and was contemplating whether she should do as Scáthach suggested and continue pursuing Jaune. "It's just, doing this training made me realise that I'm getting old. Realising that made me reconsider things".
"Does it have something to do with you pursuing me?" Jaune asked. Willow was shocked, she wanted to explain, but Jaune covered her mouth with his finger. "You don't have to worry about that. My wife already told me how you had a thing for me since Weiss' birthday. And since my wife doesn't mind me having a relationship with you, I would love it if you were my girlfriend".
"I would love that, Jaune," Willow said. "And Weiss already spoke to me about it when she noticed my infatuation with you, which she said she didn't mind me dating her friend since you are an anomaly. I'm not fully sure what that means, but I realised just how much older I am in regard to you, and I don't know if I should be dating you".
"Ha-ha-ha-ha! That's what you're worried about?" Jaune said while wiping tears from his eyes due to laughing hard. "First of all, you know that Scáthach, my wife, is 2000+ years old. So, you don't have her beat in age.
Secondly, in Remnant, I may be legally turning 18-years-old, but chronologically, I'm 49-years-old due to circumstances.
Lastly, I have something that can help you regain your youth. However, make no mistake. I like you just the way you are, but if it helps you, I don't mind giving it to you".
R.W.B.Y.J. the second was once again listening to Jaune and Willow.
"This is rich! This world's Jaune is smooth," Blake-II said. "Nothing like ours".
"Hey! I could be that smooth if I wanted!" Jaune-II said. "I just didn't have time to prepare when serenading Weiss".
"Jaune, I see you as my best friend, and you're a great guy," Ruby-II said. She then pointed at Jaune. "But you being as smooth as he is? No chance! You would have this false confidence whenever you try and serenade Weiss. But that Jaune is just being himself, which seems to catch the attention of Willow".
"I still can't believe there is a Jaune that could be a step-dad to another Weiss," Weiss-II said. She then looked at Jaune. "I swear to Oum, Jaune! If you try and serenade my mother back in our Remnant, I'll make sure to cut off your manhood!".
"Why?! I already told you that I'm not into older women!" Jaune-II said. "I'm more into shorter women".
"Wait! Is that the reason you had a thing for Wiess?" Yang-II asked. "No wonder you didn't have a thing for someone like Blake or me. Then how come you didn't go for Ruby? You two were quite close".
"Uhm… It's just that Ruby was fifteen," Jaune-II said. "It's just imagining dating her back at Beacon felt wrong. I like Ruby, but she was too young".
"Oh, come on!" Ruby-II said. "It would have only been two years difference! It's not like we would be doing any sexy time at Beacon. Miss Goodwitch would have a way to find out such things".
"Look, I know that, Ruby. And I'm not looking for a relationship just to do the do," Jaune-II said. "But imagining dating you still felt wrong. I don't feel that way now, but I did back then".
"Oh…Oh! He-he-he!" Ruby-II said. Jaune-II being a Jaune, didn't realise that Ruby was scheming something.
"It seems like you guys love to chit-chat and eavesdrop on other people's private matters," Scáthach said. "It seems a harsher training is needed to make you take this training more seriously".
"Please… no," R.W.B.Y.J. the second said with fear. They decided that when they're inside the training, they will keep their trap shut at all times from now on.
A few hours later, after training Willow. Jaune brought Willow to his room for some privacy. Jaune really didn't want to give this to Willow as he liked her just the way she was, but it would be helpful for her health and training. Jaune took out the Potion of Youth he received from Gilgamesh and diluted it in water. He had to do this as the potion's potency would have turned Willow into a child, and Jaune wouldn't want that.
"Here, drink this," Jaune said while handing a glass of water to Willow, which contained a portion of the Potion of Youth. "This would be able to give you back your youth".
"Is this why you look so young despite being 49-years-old?" Willow asked. She then looked at the drink in her hand. "I thought something like this was nothing but fantasy".
"Actually, no. This potion was something I recently got from a friend from a faraway land," Jaune said. "As for things like this being fantasy, I suggest you get used to seeing more crazy things now that you and I are together because things like these are a norm for me".
"So, you're serious about me being your girlfriend?" Willow said. Her heart was beating hard. Jaune then nodded at her and gave her a deep and passionate kiss. "Wow, I've never felt such a deep kiss before".
"I can give you more kisses later," Jaune said. "For now, go ahead and drink the Potion of Youth".
Willow drank the Potion of Youth, and nothing happened at first. That's due to it being diluted. However, after thirty minutes, Willow's looks were changing. Her snow-white hair started to look silkier and smoother than before. Her breast and butt had become tighter and firmer. The few visible wrinkles that Willow had also disappeared. Overall, Willow looked like she was in her early twenties once more.