Hubster has 3 sisters. The older 2 are welcome anytime. The younger of the 3 I wouldn't p*** on if she was on fire. Might be tempted to put out the embers with a shovel though.
She does not come to my home. She is not allowed over the garden gate threshold.
M-I-L was great, a lovely lovely woman who died January 08. F-I-L died last Feb. Not so keen as he used to slap me around the backside every time I passed him. He left bruises on more than one occasion. Hubster and youngest sis in law says that was his way. Sadly my way was to tell him that if he did it one more time that I would break his arm. When I say bruises, I don't mean little slightly off colour ones, I mean big black buggers that were big enough for my GP to ask if I was being spousally abused.
Good luck with your in-laws. If you both hate the in-law visits, why not suggest a hotel and just go out for a meal?