Embarrassed At Thanksgiving

Hanging out with the family after dinner. I overhear part of a conversation between my mother and aunt about gay, lesbian trans etc. My mother drunkenly blurts out "I wouldn't know how to react if one of my grandkids told me they were gay." I hollered back at her "Pretty sure you don't need to worry about it!" I realize that I said the quiet part out loud. I look over at my niece and nephew and they are beet red with embarrassment. The reason I walked in on them fucking each other a few months ago. I've also bought my nephew condoms when he's asked. (Didn't know they were for his sister at the time.) Anyway, I had to get up and walk away so that I could have a chuckle about it in private.