Lips curled into a languid smile, he pecks her lips gently again, eyelids weighing over his eyes. "Mm, I'll call her tomorrow."

He's got something keeping him busy right now, and he doesn't want to interrupt that to go call his mother, much as he loves her.

"S'pose you got 'til then to change your mind..." He kids, of course. But, well— one never knows. At least he'll know she's sure.