Sleepover at his girlfriend's place. Go to bed early, then wake up after everyone was asleep and go to his girlfriend's room. Foolproof. [mistake] [implied] [seduction]
Girlfriend turned to me while in bed on Thursday night before my weekend trip and asked "Do you think I should send you on your trip in the cage?" 3 days later and still on!
Your girlfriend was lying in bed with you, consoling you while you cry about how cruel your dad is to you. Then he walked in. "You keep my name outta your mouth, I keep this outta hers. Got it?"
