I am single, and my brother always insists i stay with him, his wife and 2 kids when i visit. THeir house is small, the kids have homework and soccer and dance and birthday parties and on and on and on....chaos as you say! But the kids LOVE having me there and I love to spend time some one on one time with them. I just try to sit back and let the chaos happen around me and help out where i can

Now my parents on the other hand, just are not comfortable staying there. They are older and cranky and set in their ways. They stay at a nearby hotel and are happy that way. but the kids always ask why grandma and grandpa don't stay at their house, lol.

I think if your sis didn't want you to stay there, she wouldn't have offered.