Friend masturbated loudly while at a sleepover?

Question

so my younger friend who I was babysitting (shes 13) slept over at my house with my friend who is my age (18) we are all girls btw. as soon as we turned off the lights the younger girl started masturbating and moaning like the whole deal. me and my friend didn't say anything for a. while but then it became like very intense masturbating. we flashed a light on her and were like what's going on you ok. she kept going though! until she orgasmed then fell asleep. I was wondering if I should confront her about It or pretend like I forgot about it. I just dont want it to happen everytime she sleeps over.

Answer 1

i invited my two friends ( we all 13 yr old girls) round to stay. we was watcjin slushy romantic in my bedroom when one of them starts playin with her b***s. then the other started playin with her b***s  and then they started mastubating, like fully naked on top of the covers. when they had finish they offered to do me as well. it was dead awkward and i said no, but i think it hurt their feelings. how would i raise it up and tell them that i still like them as friends but just dont want to go that far.