I'm uncomfortable around my father-in-law after he sends porn to his adult son (my husband) and want to protect my future kids from the perv.
Do you think you know why he sends porn?
I probably know better than you do.
It is understandable why you wouldn't want your kids to be around a person that think it is okay to send porn to their son. It is protecting your kids from somebody that might be a pervert.
Screw it! I wouldn't let that pervert anywhere near my kids.
It's fair to want to protect your children.