Apparently the husband had his wife so worked up that she was ready to put any hole in her body just to have a rest, so he found a neighbor, whom he periodically fucks in her presence. At the same time she is completely uninhibited, and gives in the ass, and in all the slits that he asks, because his large cock she likes thoroughly, judging by her moans, even more than thoroughly.
When a brother, albeit a stepbrother, sleeps with his sister in the same room, sex between them will happen sooner or later. The smell of her body, her rounded forms will make any guy masturbate. And the pictures of her in his smartphone turned his sister on. She felt like an adult magazine star. And she wanted to thank her brother for the experience. In her own womanly way... And it was satisfying for both of them.
The important thing is not the fact that her ass is big, but how the fat lady knows how to use it. To accentuate her beauty, she smeared oil on her ass, and then actively jumped on the shaft of the mongrel.