Pregnant and worried husband will cheat!

I'm pregnant and worried my husband will cheat. I heard so many stories about men cheating when their wives were pregnant. Men say cuz their wives bodies aren't the same and they don't find them attractive. I don't see my husband being turned on by my pregnant belly either. We do the same position side by side my back to him. It's getting old! I'm worried he's going to want sex with a girl he can at least go on top of lol.