Originally Posted by
FindingPeace1 
What happens in your mind when you play out you telling her, "I don't trust you. You're not safe to watch our child. I've made arrangements with the daycare and it is NOT an option to do anything else."
Could you just tell her that you've signed your son up for daycare through the summer and leave it to AW to ask why? If she has the nerve, that is--I bet she knows why.
This frames the conversation differently than if you start by telling her that you don't trust her and are therefore sending son to daycare over the summer.