Girl shares her boyfriend with best friend

The two girls were very good friends. One of the girls had a boyfriend and one girl did not have a boyfriend. The girl who did not have a boyfriend was trying hard to make a boyfriend but she was not able to make a boyfriend. One day she was very sad, so her friend asked what happened, why are you so sad, then she said I want to have sex but there is no one, on this the girl made her have sex with her boyfriend.