My DD is 7 years old and she is friends with a boy from her school. Yesterday she invited this boy over to play and his sister (6 y.o.) came along too. They've all played together before and they all get along fine.
They played in the garden, ran under the sprinklers and had a lot of fun. The girl asked me to take her to the bathroom, which I did, but she went in alone and I waited for her at the door.
DD and the girl showered afterwards (which they've also done before at this girl's house, after swimming) and then they chose some clothes to get "dressed up".
While they were getting dressed I stayed with the boy who was eating some fruit in the kitchen. DD came downstairs and the other girl took a little longer. When she joined us, the three of them started playing something else. When it was time for me to give them a ride home, I started picking up their stuff and found poo on my daughter's bed. I was shocked as we have no pets and this had never happened. DD and the boy were surprised and grossed out but the little girl wasn't. She kind of laughed and said it must have been the cat... (we have no pets).
I believe it was her because the boy didn't spend any time alone in dd's bedroom and dd's never ever done anything like this...
I'm fairly good friends with the mom and, if this were my child, I'd definitely want to know what was going on. But since I didn't actually see it, I'm not sure whether I should tell her about it. I have no idea how she'd react.
Would you tell her? If so, how would you say it so it does not sound awful?