My mom makes a lot of uncomfortable sex jokes when it comes to my husband

My husband is not a very sexual person. Sex talk and things like that make him really uncomfortable. We have sex a few times a month and I use my vibrators the rest. But we have a really nice marriage. Before anyone asks, there is no medical issues. He doesn't have low testosterone. He's just not very sexual. My mom has always made sexual jokes asking my husband when he's gonna fuck me enough to put a baby in me. When my husband has lotion for his eczema she made jokes about him using it to masturbate. She has a key to my house because she used to be in an abusive relationship and she had an open door policy with us. She's not anymore but still has that key. She came in the house and for some reason went into my bedroom. My husband was getting out of the shower in our room and she saw him naked and laughed. He was mortified but ever since has made jokes about my husband's huge penis. She doesn't stop no matter how uncomfortable it makes us. I've told her he's not a sexual person and doesn't like those jokes. She's said either he's gay or not into me because nobody with a penis that big wouldn't want to use it as much as possible and has said that to him. She's very immature and does not respect us enough to knock it off