My hub said his dad can't stand it when when he brings up our son.

I know he's not deep but damn. My hub says he just won't reply when he brings him up. He's cool in his own way, my hub's dad, but he can be an ass. I stopped seeking him out for conversation years ago. When I'm there I talk to him enough to get by and not be rude. I sent some cookies over with my hub not long ago when he was going there. But that is where I leave.