Got a few different jokes for this one:
1. “In fairness, we did establish back when I broke into your grandparents house that you are 96% of my impulse control.”

2. “Hey, is it my fault if each of them independently came to me wanting to ‘Take one for the team to have another little Steven running around’ without letting the others know?”

3. “To make it up to you; when I go to claim the Diamonds, I’ll leave Spinel untouched just for you.”
“Dad I’m still with Connie.”
“…Oh. Really wish you’d been that direct when I offered to ‘take care of her for you’ while you were soul-searching.

Stevemuth and Stevis are perfect. Must protect at all costs.