My girlfriend's sister gets fucked by her friend while she watches

The video features a young couple, the girlfriend and her friend, who are sharing a dorm room. The girlfriend's sister, who is also a student, comes to visit and the girlfriend invites her to join them. The friend is hesitant at first, but the girlfriend'sinvitation is too tempting to resist. The three of them start to chat and the conversation soon turns to sex. The girlfriendsister is curious and asks the friend about her sexual experiences. The friend shares that she has been having sex with the girlfriend, but she is not sure if the girlfriend knows about it. The girlfreendsister is intrigued and wants to see what it is like to have sex with a girl. The friend agrees to show her what it feels like and they start to kiss. The girlfrendsister is excited and starts to touch the friend's body. The friend enjoys the attention and the two girls start to have sex. The friend's boyfriend, who is watching from the corner, is also turned on and starts to masturbate.