Confused grandma.

Recently I found out a have a grandson. My son wants nothing to do with the baby. This isn’t my sons first rodeo he has two other kids that he played this game with. I recently got a text from the babies mother asking if I wanted to be in the babies life. I don’t want to be involved with the child right now, maybe when he gets older he’s 3 months but right now I am not interested. I haven’t replied what should I say to the mom? I don’t know her my son never mentioned her to us. She’s never asked us for money anything but she wants us to be in his life. I’m not comfortable with this since we don’t know her, and I don’t want to betray my son.

Edit: there was some drama in the beginning. Her younger sister tried to fight me because she said my son was a deadbeat and I allow him

To be a deadbeat. The mother asked me to let her know if I want to be in the child’s life and if not she’d have my grandparents rights terminated. I refused to terminate. But like I said he’s a baby we want that bond with him just not right now, he’s too little. I don’t really like babies. My sons kids are 4.5,3,& then 3 months. We take care of the other two we see them, we get them every weekend, they have the same mom. The baby has a different mom. My husband went out and spoke to her when she asked us to terminate and she didn’t give us any phone number she just walked away in the middle of him talking.

Edit 2: I don’t KNOW her that well. She came out the blue. We asked for a dna test it came back positive. Her sister became upset because she said that I allow him to be a deadbeat he is (23) he does what he wants to do! I can’t make him be a parent, we’ve talked to him over and over and over. We didn’t raise him this way. All my grandkids are the world to us, we show them off equally we love them equally. We don’t want this Child to feel unloved or unwanted I’m just confused.

Edit 3: I have raised my kids. I don’t want to change diapers & do midnight feedings anymore. I DONT KNOW HER. THEY WERENT EVEN TOGETHER!! THIS IS NOT MY PROBLEM. He’s a baby right now anyway he doesn’t know he even has grandparents!! I don’t like the way her sister spoke to me we aren’t those drama filled kind of people. & I’m not terminating my rights to him. For what? She’s just doing it to be extra