Father in law touching belly?

My husband's dad in particular is especially creepy. He once said I was 'the hottest piece of ass he's ever had in his house.' And he constantly tries to make me out to be a bitch now that I set some boundaries for him. Now I'm only 6 weeks but I'm worried that when I start showing he's going to want to touch the belly and I'm starting to get creeped out just thinking about it so should I let him or just tell him I'm not comfortable?