Room mate drama

I have lived in my house for 1 year. i recently separated from my partner and It was just been me and my 3yo daughter.

i recently asked a friend to move in with her 3 yo daughter as she is also going through a break up

She has recently started seeing a new guy who come and stays over at my house multiple times a week.

I am starting to feel uncomfortable with having this guy come over all the time as its my house and there are two little girls that live here. I make my daughter sleep in the room with me when he comes over cause you just never know !

i feel like saying something to my room mate / friend about her new guy coming over all the time.

Am i overreacting ?