My sister-in-law invited her friends and held a sleepover party on the days when my parents were away on a trip! It was noisy even late at night, so I went there to be careful and found everyone wearing no bras and having a pajama party! While I was perplexed by the erotic scene, she forced me to participate in a girl's talk...I got an erection because I could see her nipples without a bra through the gap in her pajamas...My sister-in-law's friend was excited by his erect penis.