I've just relayed a story to my mum and her reaction has baffled me. The story is ds2's friend isn't speaking to his dad. He told ds2 this is because his dad had sex with his maternal grandma. Obviously we were both open mouthed with shock but when I told dm she seemed very calm about it and said, "well it's not normal exactly, but it does happen. You like the daughter so you'll like the mother", as if it was not that bad. She then said that since his mum and dad had split up he obviously needed a substitute. I told her he'd slept with his mother in law while they were still together but it's neither here nor there.
Honestly, I'm a bit disgusted with her response. It's not normal, is it?!