The chick is used to being treated this way. The impotent husband lost her at cards. That's why they've been pulling her like a bitch all day long. And the harder the stake, the harder they drive it inside. Only the pussy is already so used to the new masters, to the abundance of milk - that she does not want to go back.
This guy's jackhammer is kind of sluggish - I'd go in there with my periscope and jerk it a couple of times! With breasts like that, you can have multiple males at once - you just have to wiggle your finger. And the mother is really cool - look how the eyes shoot, she enjoys being filmed. That's the effect the scene has on women. Even in bed.
The woman is juicy and very roomy in the body, but she's noticeably happy with sex! It's pretty rare that women of such a large build who have given birth lose such sharp sensitivity in the vagina and only enjoy anal sex so much!