my in laws (help!)

Remember I have written about my family recently? Well, there are certain human beings that are not part of my family or whatsoever, but come home anyway. May I present: my in laws.
My eldest brother Andrés got married once. Because of destiny, or inmaturity, it's the same, he split up with his wife. Then he found another 'lady', Patricia, and things got a little complicated. Apart from these lovely people that we met thanks to Andrés, my nephew and nieces got in the middle. Nowadays, Patricia comes home with my brother, but we are still in close touch with my first sister in law, the mother of my dearest children.
On the other hand, my cousin, Esteban, who I love as if he was a brother, got married to Susana. Susana is... well, she is the kind of person you try to avoid at all costs: always in a fight with someone. Impossible for her to keep a secret And I don't know how, but these peope always manage to find you.
So, I have three sisters in law. I don't like any of them, so I never go to their homes, even if that means stop seeing my brother and cousin. The thing is that they do come to my home. They invade my space constantly. And when they are around, everything gets screwed up: they would talk at each other's back, and then gossip whispering in the kitchen, in my kitchen about the family, as if they had the perfect family (excellent idea for another entry!). Of course, no one sees this. Or if they do, they just ignore it. And maybe I should do the same thing: just pretend they don't exist. But I can't. No Sir, I refuse at the idea of having these poisoning snakes at my house, criticizing my not-at-all-perfect but genuinely sweet family. I mean, who do they think they are? We were doing great until they got to the picture.
Sometimes I think that I shouldn't be angry at these bone heads, but rather at the men that had brought them in the first place (clever move, guys!) You have well chosen (irony).
So that's it with my in laws. You know what the worst thing is? My youngst brother, Damián, is still single, and knowing him as I do I can just predict the kind of woman he's gonna choose for himself (nooooo!!!)