Setting boundaries with MIL

My mother in law comes over 1-2 times a week, and is constantly harassing us to come over, or for us to come over so she can see our three month old daughter. It has been like this since my daughter was born. It is the only thing my husband and I fight about. Does this sound okay to say? I’m fed up at this point, but don’t want to hurt her. Would it be better to let my husband say something and sugar coat it, or for me to straight up say it like this, and get all the points across. I don’t want her to dislike me, or for things to be awkward.

UPDATE: I sent it, after stressing over whether or not to, all day long! She responded in the best way possible, and I was so happy with her response that I cried. I was super worried she would get mad at me, and I really didn’t want that, because besides the constant visits, we have a great relationship.