You shouldn't sleep with partners your friends are interested in.
Sabrina has a crush on Roger, who her friend Danielle has shown interest in the past year.
Sabrina wants to make a choice.
Sabrina takes notice of Roger's attractive brother and asks the two of them to go on a double date with Danielle.
Sabrina seduces Roger, and Danielle sees them in bed together.
Danielle is grateful to Sabrina for bringing her closer with Roger.
Danielle feels betrayed by Sabrina and ends the friendship.