Wow! She sounds crazy! I've had them poop during nap and I don't get to it until 2hours later because it doesn't wake them. It's a little hard to clean off and a little red, but nothing that stays long enough for a client to even notice.

Yes, a conversation about trust is important. First time moms can sometimes act a little nutty! I would start the conversation about concern for the little one. Bring up things like yeast infection, teething etc. And let her know that in your experiance (key word) rashs take time to develop into sores. Re route her thinking that it may be something else. If shes' still dead set that you did this to her... then it's a real cause for concern. Then I would have the trust conversation.