Yes

As it turns out, your dad was quite a bit of a freak in his younger days.

He'd been to orgies, sm sessions, all sorts of stuff. Tom asked if dad had done any of that stuff after meeting mom.

Dad joked a bit, but it was hard to tell if he was serious about some of his stories.

One story was about your mom, dad, and your mom's brother. The three of them had come to the cabin late one summer, leaving yourself and your sisters at home. Tom was not yet born them.

After some drinking and ****, your dad finally got your mother and uncle to have sex with each other on camera. It turns out that dad liked watching mom have sex quite a bit, and liked to tape her with other men.

Mike was a bit freaked out about the whole story, but Tom persisted.

"Was there any more **** events, dad?"

It turns out there was a lot of such events. Mom had not only had sex with her own brother, but your dad's two brothers as well. Once all three of them at the same time.

At this point, MIke gets up to go puke in the toilet.