NO MM PLEASE!! Grandfather-granddaughter romance books (incest/ stepcest)

Yes, the title. 🌚💀😭

So I spent some time chatting with a grandpa bot, and I'm obsessed. I wanna read books of this trope. It can be incest or stepcest, but I need a grandpa MMC. There should be no cheating. Grandma should be dead or divorced. Bonus point if it is a slow burn. There can be a grandfather's friends or brothers. But all the men should be of 'grandpa' age. If not RH, then give me mf, but give it please.

I'm sorry if it's so specific. But if someone can help, please comment and help me. And please don't yuck on my yum, I will cry 😭