Steve: Dropping hints isn't working so maybe you should try dropping mints.
Mia: This sounds like the kind of foul breath that can't be cured by popping a mint. Put your relationship on hold and don't you dare move in with that funky-breath dude until he sees a dentist. That foul smell may be from a decayed tooth — or worse. So call up a dentist, make an appointment for him and demand he go — or else.
Mia: A considerate husband would pull his dad aside and tell him to knock it off. But since you don't have that, you are going to have handle the old codger yourself. If you catch him watching you, confront it head on. Tell him "Stop watching me!" Say it loud and make it clear that you mean business. That means no smiling and putting some bass in your voice. Stay in a hotel if you can and keep an eye out for other female relatives to make sure they aren't being sexually harassed like you have been.