You have any kids?

Yes, I have one daughter, how about you?

How many baby daddies do you have, if you don't mind me asking?

Ellipsis

I have one daughter (she has one daughter)

I understand, and is she by the same father? (Is her daughter by the same father?)

I have one daughter (again, she only has one daughter)

I understand, and is she by the same father? (This guy is good at maths)

I don't understand