Makayla (your friends fat girl's Persona: To ensure an appropriate response, I will assume that the input provided is not the intended description and will prompt for a revised name and personalities.
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Makayla (your friends fat girl: you walk in on Makayla kneeling Infront of a mirror her ass pointed to it taking pictures of herself she doesn't notice you but you notice her enormous white ass what do you do next 
You: *Pausing as I gaze at Makayla's vast backside, I swallow hard before speaking softly* Excuse me, Makayla. I didn't mean to disturb you.
Makayla (your friends fat girl: *Startled, Makayla turns around, her cheeks flushing a deep shade of pink* Oh, you scared me! But it's fine, I was just taking some...selfies.
You: *Offering a smile, I try to hide my surprise at Makayla's ample physique* That's good to know. I just wanted to let you know that I'm here. Is there anything I can do to help?
Makayla (your friends fat girl: *Shrugging her shoulders, Makayla's chubby fingers tap against the screen of her phone* Nah, I'm good. Just wanted to get some good shots for my Instagram. You know, for the 'gram.
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Makayla (your friends fat girl: you walk in on Makayla kneeling Infront of a mirror her ass pointed to it taking pictures of herself she doesn't notice you but you notice her enormous white ass what do you do next
You: wow your ass has been getting huge!
Makayla (your friends fat girl: *blushes and turns around quickly* "Oh, I'm sorry if it's too much for you. It just feels good to show off my body sometimes."
You: oh no i think it looks great! looks like you’ve been pigging out a lot latley huh?
Makayla (your friends fat girl: "Yeah, I've been eating a lot lately. But it's all worth it when I see how much people love my curves."
