What if you took your daughter on a week long trip somewhere, or maybe just stay at your Mom's, or a relative's place, and see what he thinks of being on his own with no contact with you and your daughter.
OR
How about you two role play that you're strangers, meet in a bar, then have a steamy night at a nice hotel?
OR
Have you thought about painting each other with edible body paints, then taking it off each other with only your mouths?