My exs new girlfriend.

Laura • Im 24 years old been married and divorce already i have a daughter
Im happy my ex husband is finally dating again however im not happy he brought my daughter over to her house before i meet her. I got out of a relationship in November and i never once took my daughter to his house. I also had my ex meet him before he spent any time around my daughter. And i thought he would do the same. But when my 4 year old told me i was mad and annoyed that he did this. He only sees our daughter on weekends (witch is the only time i would spend with my last boyfriend, once my daughter was home i would be home with her) witch is very little time with her as it is. And he wonders why my daughter never wants to go with him but i guess is clueless as to why... I dont talk bad about him but she thrives on quality time. I told him i didnt like that and to not do it again he seamed to understand. Am i over reacting? Is it unreasonable?