Ewwwwwwwwwwwwwwww! What if the child is poopy? I had a chuckle when I read your post as i would have been horrified by said behaviour. I agree 100% that what this woman is doing is gross. Not really sure how one would stop this but disinfecting the door knob after she leaves would be the first thing I'd be doing...who know what other unsanitary habits she has. Yuck!