Her to seduce her roommate

"When your mate arrives home i want you giving her a wet kiss. Out there i don't care if you're lesbian or hetero, but in this appartment you've to be only into girls and will have to flirt wih her once and again"
She looks at you atonished "But my boyfriend..."
"Easy: you can have sex anywhere by here... he better understands or he'll have to understand he's a cuckold"