I let him do things that she won’t. She thinks he’s forgotten about it but in reality, when with her he’s thinking about tying me up or handcuffing me to the bed.
She knows when Daddy's about to cum to start massaging his balls. Then as he shoots and pulses, you keep stroking, sucking, and massaging, until he tells you to stop.
Helping Daddy enjoy his cake. She isn't allowed to even see his cock until she has properly given him her throat. The learning process is the best part.