Sounds like this lady is not much of a friend. I would be mortified if my dog did this in someone's home and I would never bring my dog along w/out asking first. The only place we take our dog w/out asking is my DMIL's house - and she does the same w/her dog when she comes tomy house. As long as no one leaves any piles or puddles everything is OK. If your friend is afraid to speak up for herself I guess she is just going to have to keep cleaning up someone elses mess. She is a big girl - she needs to figure out how to handle it.