Others kissing my baby

Kimberly
The other day I noticed that my SO's brother kisses my newborn baby girl on her face a lot. I don't like it at all. I find it gross. He smokes pot and shares bowls and crap with other people. He also doesn't seem to have the best hygiene. I don't know how to tell him to stop kissing her. I feel like if I tell my SO about it, he'll just get mad at me.