As a robot,Kai thought she knew the answer to everything.Though,when it came to Aunt Flow,she was baffled.

She knew she wasn't human,so why did she go through this?

Kai was working on a new project in the lab.Suddenly,she felt a liquid run down her leg.Her eyes widened as she ran to the bathroom.

After cleaning herself up,Kai went to April.Surely,she would have something for this.Luckily,she was sitting on the couch,watching tv.

"Um,April.May I speak to you,alone?" I asked shyly.She smiled and followed her to the lab."So what's the problem?" She asked.

Kai gestured her down and whispered it into her ear.April's face spreaded out as understanding."Ohh,don't worry.I have what you need." April said with a wink.

After receiving the pad she scurried down to the bathroom.But bumped into someone.

Her boyfriend..

"Hey Kai.What'cha got there?" He asked.Kai blushed."Um,Uhhh," she stuttered.

"Kai,are you feeling ok?" He asked.

"I-It's nothing!!!" She yelled and ran to the bathroom.

Metalhead was confused.Why was Kai acting strange?He decided to go ask Donatello.Donnie knew what was going on and when he told Metalhead,Metalhead stuttered ans grabbed some supplies.

When Kai walked out,she was carried from behind and sat on the couch.Metalhead sat next to her.He wrapped his arms around her.

"So,Once a month,right?" He asked.

Kai realized this and giggled."Yes,"

He breathed out,relieved and cuddled with her.