Your friend’s daughter when he leaves to grab some drinks...

Your sister’s best friend when you’re introduced to each

Alone with your friend’s sister while everyone’s out... [Caity

Friend’s sister catching you peeking... [Lizzy Caplan]

Your friend’s sister seems to have forgotten you were visiting

Your friend’s sister thinking about you... [Zendaya]

Your friend’s visiting sister sure seems to have put in extra

When your friend asks where you were the night before, and you

Spending most of the time at your friend’s Halloween party

Friend’s sister is a tease. [Isla Fisher]

Friend’s sister seems overwhelmed when you drop your pants...

Friend’s sister knowing she’s about to lose after betting