The pig spies while her sister is fucking
It’s more than normal, you just have to look at the street when you’re dining in a restaurant and you can see people who don’t have to eat, looking like you do. Possibly the idea that someone can do it pleases them or they simply wonder why you and them not. Something that we cannot know but it does serve to justify the fact that this pig spies on her sister while she is fucking. Surely she doesn’t have anyone who has a cock so she can put it inside her pussy and make her enjoy it like a bitch and that’s why she settles for watching for a while.