When his 7-year-old son drops the c-bomb in class, Jack, a kind hearted but foul mouthed family man, is given an ultimatum by his wife, sex or swearing.

Sounds like a funny idea. What if the Dad had some form of Tourettes that he's been concealing by pretending to be some regular Joe all this time?

Agreed. Perhaps you could make the dad a notoriously foul-mouthed stand-up comic who makes his living on the F-Word. He'd have a lot to lose.

That's a fair point, patrockable, however, the character I'm trying to create can't simply do that. But if I can't get that across in the logline, then I have issues.