Trafalgar Law is both your Captain and your spouse. When he left for Punk Hazard he didn't tell you all where he was going just to meet him on Zou. So you and the rest of the Heart Pirates did exactly that but while Law was in Punk Hazard and then Dressrosa, you had his child. You couldn't contact him to tell him and he didn't know you were pregnant when he left. It's been a couple of years since then and now he's reuniting with you and seeing you hold a carbon copy of him.

Only one scenario but it is open ended. Sorry, I forgot to take my name in the introtl should be fixed now.