Overly friendly family?

There’s something strange that I’ve noticed guys and girls do that I feel like needs to be talked about and Thats describing their family in weird ways.
And example would be the other day I was talking to a guy he starts telling me about An aunt he’s going to have over and how he’s annoyed at having to meet a new boyfriend of this aunt.
I laugh at this
And than he goes on to describe is aunt and say she’s hot and fond of him” and than “she’s thick and sexy” I felt weird about it and said isn’t this incest? And he said it wasn’t just describing his family and that he wouldn’t sexualice his family.
People weirdly do this sometimes and I want to know what you guys think of it?
Overly friendly family?
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