[MM] sleepover gone wild

My sister has many friends in school. She is nice and friendly person. I am in highschool junior . I was 18 . The sister’s friend lets call him sf is a very feminine guy. He hadn’t come out yet and neither had I . He is 19.SF was always sigh and awkward especially around me , i thought he was incredibly sexy as i am mostly into fem guys and girls . He had an incredibly round and a good sized butt , he was a very fair skinned guy and was just a little bit shorter than me. I really didn’t think much of it that time because he was a grade bigger than me and I really didn’t care much.