The sisters are totally different - one is active and energetic, and the other is quiet with glasses. And the second was afraid to have sex with a guy - even her panties were not sexy. But still even she got aroused when the guy started fucking her sister in the asshole. She licked his dick before doing it and started squeezing his balls. Just like that, the quiet girl joined in. And I hope she didn't regret it. The main thing is to start and suck in time!
From my experience I confirm. that fat mistresses are much more relaxed and debauched than skinny ones, with their lush forms they understand that a man needs more effort to satisfy them, so they try to please the man in sex in everything.