Do you think gay siblings act different behind closed doors or with close friends?

Okay, so two gay sisters. Or two gay brothers. They act differently, but this isn't an incest thing. But more of them buttering each other up and making each other more attractive to the..."relationship customer". So that may involve some light touching, flirty selling and... this is weird af I'm sure but I have to know for a story of two siblings. I doubt this happens IRL but... what do y'all think?

Rose, wtf, they're siblings? They act like how they would if they were straight.
It was a rare case back in my day but... they were weird. And rare.
Go to sleep, rose. For 4-6 months, please.
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Okay, so i may have asked this question before but I couldn't explain myself so people will say "Incest"... thus why I had to make this one because that's not what i fuggin' mean. And that is weird af. However, both questions have gotten valid answers and I thank you all. Sooo back to sleep until November?
Do you think gay siblings act different behind closed doors or with close friends?
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