While I totally get it, this is not the hill to die on. Of course the kids are going to think she's freaking awesome...she's not their parent and doesn't have to make them act in the manner you do. You have got to let that stuff roll off your back.
As for her babysitting, I totally understand you wanting XH to spend his time with the kids alone, but you have no control over what happens at his house. Much like he has no say over who you get to watch the kids at your house. Is it completely frustrating, absolutely, but it's not your place to say anything.
While I totally get it, this is not the hill to die on. Of course the kids are going to think she's freaking awesome...she's not their parent and doesn't have to make them act in the manner you do. You have got to let that stuff roll off your back.
As for her babysitting, I totally understand you wanting XH to spend his time with the kids alone, but you have no control over what happens at his house. Much like he has no say over who you get to watch the kids at your house. Is it completely frustrating, absolutely, but it's not your place to say anything.