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.
So the daughter had sex with her son in the morning - what's the problem? It's for mood and health - instead of exercise! And what mother can be against exercise? So what, a couple of drops on the floor - as if her kitchen stove does not splash anything. She'd rather thank them for living a healthy lifestyle. )))