So...the mother of your child's friend has overstepped a few boundaries.
Your daughter and her daughter are good together and for each other.
When questioned as to why your daughter can't spend the night, you answered, "Because I said so. Do I need to come pick her up or are you still going to drop her off because I can head out right this minute to get my daughter."
She brought your daughter home.
It was quiet for a few weeks and then Spring Break was approaching.
You were at work when you received a text message from the mother asking if your daughter can go swimming with them later that day.
You respond, "Can't talk, in a meeting. She can't go today."
You receive a text IMMEDIATELY back asking if your daughter can do something with them tomorrow.
You look at the text and see red because, again, you told that chick you were in a meeting and now...you're counting in your head so you can visibly appear to not be LIVID.
By the end of the meeting you've calmed down and decide to not answer the text.
QUESTION: Would you call the mother and ask her to meet you for coffee so you may discuss and be CLEAR about your expectations? Or would you just cut her off completely?