Your life sucks. Literally, at that moment, your life sucked. Hope dad was on the phone or outside a locked door. Lol

How long does it take you to pull a cock out of your mouth? It's not like you're trying to solve a puzzle in the dark. If your boyfriend's dad stayed on the other side of the door, he wouldn't have seen you. If, however, he was in the room with you, that dude knew exactly what was going on, so you could have stopped, and replied regardless.

You couldn't just jerk him off while answering? You need to watch some porn to learn handy tricks like that.

You could have taken it out to make small talk.