I'd have a hard time enjoying myself somewhere that my girls are not welcome....
I am physco about keeping the girls off of the carpet! Cause they are not house trained yet! And my mom brings her Chi over... Who is not House trained... She lets hers pee all over the house at home!

She has throw rugs all over and she washes them every week... It also smells like S#@T in her house! I flip out when she puts her Chi down on my carpet! She starts sniffing around and I leap up to grab her! I have tried explaining that I don't even let my OWN dogs run the house.... Why would I let hers?? I welcome hers but only if she can respect my rules! If she took measures.... I don't know... I have not said that her dog is not welcome yet... but boy I am close!! But not because of the dog... its the owner!!! lol
I think that if you are making an effort to protect her home... then she is way out of line... Especially if she is not extending the same to you!!!