When dad is late, you care to give pleasure to the mother

Every time my father will arrive late from work, my mother informs me that I may give her pleasure. Always start by asking for a massage. And I know that is the signal for immediate sex. The massage the back and feet and she starts to moan. Then she opens her legs and starts to masturbate. It is always his way to make me excite. We go in the room, so my father finds us and makes me a blowjob. And then I purpose my mother. Like when I aim it doggy style. My mother has a taste for something very specific in sex. So I always do my best to please her.