I'm going to do this chapter in two parts. The first part is going to be Kat's first period and the second part is going to be bra shopping. So when you guys see the long silver/grey line that means that we are skipping a year and Olivia is taking Kat for bra shopping.

Okay, so enjoy the chapter.

Prompt: Kat hits puberty and how Olivia handles it

Kat's age: 10 (first part) and 11 (second part)

First Part

Kat groaned as she woke up. She turned around and winced a bit when she felt a light dull pain in her abdomen. Her lower stomach felt a bit heavier than usual and somehow she felt full. She could hear noises from the kitchen and the television turned on in the living room. She guessed that her mother was probably making breakfast and it won't be long for the detective to yell at her to get up. She was about to kick off the cover when she felt wet in her private area.

The young girl hesitantly peeled off the covers and sighed in relief when she didn't see anything on her pajama bottoms. She frowned when she still felt the wetness. Kat got out of the bed and turned to look at her bed sheets. Her eyes widen in alarm when she saw the blood stain on the bed. The stain wasn't that big but it was still noticeable. Is that why her stomach felt heavy and it hurt? Was she dying? Are her guts going to fall out?

"Mommy, help!" Kat yelled in panic, not taking her eyes off the blood stain.

A loud crash was heard in the kitchen then followed by hurried footsteps. The door was thrown open as a fearful looking Olivia Benson walked in the room. She rushed to her daughter's side and gripped her upper arms firmly but not in a painful way.

"What? Was it?" Olivia's eyes scanned the young girl as she checked her over for any injuries. "Are you hurt? What's wrong?"

Kat pointed to her bed as her voice slightly trembled, "There."

Olivia's gaze followed to where her daughter was pointing. She saw the blood stain and her stomach dropped. She turned her attention back to Kat. "Where are you bleeding?"

Kat's eyes dropped to the floor but pointed where she was bleeding. "Down here."

The detective let out a relief sigh but soon started to chuckle. "Oh, honey…."

The young girl looked up at her mother with her eyes wide open. "Why are you laughing?! I'm bleeding. Maybe I'm dying and you are just standing there laughing. It's not funny!"

Olivia controlled her laughter but her eyes still had humor in them. "Sweetheart, remember what I told you a couple of weeks ago. About how your body is going to start changing as you get older? Remember?"

Kat frowned in confusion before her eyes widen slightly in realization. Blush started to spread on her cheeks as she bit her lip. "Oh."

"Yeah, oh."

The young girl cleared her throat. "So this is my…period?"

"It is." Olivia nodded, she rubber her thumb over her daughter's cheek and smiled slightly. "You're growing up so fast."

Kat smiled slightly. "I guess."

The detective chuckled slightly, shaking her head. "Why don't you go and take a shower while I put new sheets on your bed, huh?"

"Okay."

"Do you still remember how to put a pad on your underwear like I showed you?"

"Yes, mom."

"Do that after you take your shower."

"Okay," Kat said as she went to get some fresh clothes before she rushed to the bathroom.

Olivia sighed heavily to herself. "Growing up too fast for my liking." She changed Kat's bed sheets to fresh clean ones. Luckily the mattress wasn't stained so Olivia didn't worried about that. After she did Kat's bed, Olivia went to the kitchen and went to clean up her broken mug coffee and the plate with eggs and toast that broke in the kitchen floor when she heard her daughter yell for her. Almost an hour later, Kat emerged from the bathroom already changed.

"It will take some time to get used to them," Olivia explained when she noticed her daughter grimacing. She nodded towards the plate of fresh made scrambled eggs with a cup of cold orange juice next to it. "Eat something before we go to the store."

"Why?" Kat asked as she sat down and started to eat her breakfast.

"Because I'm going to show you how to buy pads."

Kat chocked on her eggs as her mother took a sip of her coffee.

Second Part

Kat squirmed next to her mom as she stared down at her lap. Her mother thought it was time for her to stop wearing training bras and start using the cup bras. This is just as embarrassing at when they went pad shopping last year.

**Flashback**

"Mom," Kat grumbled. She glared down at the slightly dirty floor from the store. "Can't we just hurry up? This is kinda embarrassing."

Olivia rolled her eyes as she turned her attention back to the pads packages in the feminine aisle. "Pay attention to what I'm telling you because you will have to do this on your own in the future."

Kat huffed as she glared at the pads. Her stomach hurt like hell but her mother explained to her that they were cramps. So far she hated this whole menstrual thing. "How long is my period going to be?"

"That depends on the body. Each period is different," Olivia patiently explained. She grabbed one of the packets and gave it to Kat. She pointed on the small pad figures on the bottom of the package. "This will tell you how long the pads are. The smallest is for a light flows, the middle one is for regular flows and the third one is for heavier flows. We are getting you one of each just in case."

Kat nodded and put the package in the shopping cart. "Mom, I don't think that the aspiring worked. My tummy still hurts."

"Some medications will take a while to work, honey. Give it a couple of minutes," Olivia rubbed her back in a comforting way. "I will buy you some chocolate before we leave. How does that sound?"

"Okay!" Kat grinned. For some reason she has been craving for a chocolate bar since they arrived to the store. She stared curiously at one of the blue boxes that were next to the pads. She grabbed it and showed it to her mother, who was looking at other brands of pads. "What are these?"

"Hmm?" Olivia turned to look at her daughter. Her eyes slightly widen but she quickly schooled her features. She cleared her throat and took the box from her daughter. "These are tampons."

"Tampons?" Kat cocked her head slightly to the side, curious. "Are they the same as pads?"

"They are very different," Olivia put the box back where it was. "Instead of placing them in your underwear you have to insert these."

"Where?"

"In your lady parts."

Kat blanched as she gazed at the boxes again. "Doesn't that hurt?"

"It's uncomfortable at first but then you get used to them."

"Do you wear them?"

Olivia's cheek slightly redden but answer her daughter's question anyways. "Sometimes."

"Oh. Will I get to wear them?"

"If you want but not until you get older."

"Okay."

**End flashback**

"You must be Ms. Benson," a woman the same age as Olivia walked up to them. She smiled at them before she stared at Kat warmly. "And you must be Kat."

The young girl nodded timidly as she and her mother stood up from the chairs. "Yes, ma'am."

"Are you nervous?"

"Kinda."

"Well you don't need to. You are not the first young lady to get measured for her first bra, you know."

Olivia squeezed her daughter's hand gently before she turned her attention to the store owner. "Is everything ready?"

The woman with jet black straight hair nodded. "Right this way." She led them to a room that was almost like a fitting room but bigger.

Kat noticed racks of bras of different sizes and colors.

"Okay. Now, Kat do you have an undershirt on?"

The young girl nodded.

"You will keep that on when I measure you."

"I'm not going to be naked?" Kat blurted.

"No." The lady chuckled while Olivia pinched her nose. She had explained to Kat what was going to happen during her measurements but she guessed that her explanations went out the window. The store owner grabbed her tape measurement. "Now let's begin shall we."

Kat stayed very quiet as the lady measured her chest over her undershirt. The store owner and her mother did most of the talking. The dark haired woman measured her rib cage and her chest. After the measurements, the woman gave her a couple of bras and told her to put them on in one of the small changing rooms.

As she tried on a couple of bras, Kat realized that her mother was right about this. She needed to start wearing cup bras. She felt really comfortable wearing them. When she emerged from the changing room she gave her mother the ones that she wanted.

"Can I get the two blacks one?" Kat asked her.

"Sure you can," Olivia smiled at her. "That's why we came here didn't we?"

Kat grinned as her mother passed the two black ones that she wanted. They thanked the store owner as they exited the store with Kat carrying the bag.

"That wasn't too bad," Kat blew on her side bangs.

"I told you but you didn't listen did you?" Olivia raised an eyebrow.

They young girl blushed. "No."

"That's what I thought."

"Can't wait to tell Joe what we did today."

Olivia rolled her eyes but smiled none the less. She pulled her daughter to a side hug as they walked down the street. "I'm sure you will."

"Now, all I need is a boyfriend," Kat smirked to her mother.

"No," Olivia said flatly. "No dating until you're out of high school. Maybe even later than that."

"I was only joking mom."

"You better be young lady."

Kat let out a laugh as her mother shook her head.

Hope you all enjoyed the chapter.

I will actually update twice this week. The next chapter will actually be up the day before Xmas (my gift to you guys) and then the other will be up sometime during the weekend.

Have a great weekend!

Review!