He wants to be a dad... 6 years later?

What would you do if your daughters biological father wanted to be a part of her life after being absent for 6 years... Her whole life.. He didn’t come to the hospital when she was born and he’s not on her birth certificate.. Never ever spent time with her, never send a birthday card, never showed up to court, nothing. She only knows his grandmother and sister but has no clue that is her dad is. He reached out to me right around the same time he got a serious girlfriend. Coincidence?