Ex wife’s boyfriend texting my 9 year old and referring to her “sweet angel”

As the title states. My ex has been with her new boyfriend for about 8 months now. I was sitting next to my daughter tonight. She’s on her iPad and I saw a text from him and he said “yes sweet angel”.

I asked my daughter and she said yeah I’m his “sweet angel”. I’m sorry but this is weird to me. No matter what his intention. My ex wife is gonna say I’m overreacting… what do I do. I’m so so sick of her rushing these men into my kids lives.