I feel uncomfortable around my boyfriend’s father. What should I do?

Me and my boyfriend are together for 2 years. I know his family for 1,5 years. We are living together but visit his family about once a month.

They are quite nice people, honestly. But I feel extremely nervous and uncomfortable with his father (especially when he is drunk). He casually talks about sex in front of my boyfriend and his own wife. Asks how it’s going in our bed. My boyfriend and his mom uncomfortably laughs and lets it slip. While I’m just sitting and wishing him to stop.

It gets even more odd when my boyfriend and his mom leaves the room. I try to not to stay with him in the same room alone.

he always gives me compliments, even buys me gifts for no reason. Always talks about how my boyfriend is lucky to have me. He does all of that in front of his whole family including my boyfriend so I don’t think that he is attracted to me or smth, maybe he genuinely likes me. I don’t want to make things complicated so I’m not sure how to talk about this with my boyfriend.
I feel uncomfortable around my boyfriend’s father. What should I do?
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