Well we don't know anything on what happened for Nero's mother unfortunaly. But it worked out for Nero because he wasn't presented as Vergil's son right away, and in the end he turned out to have his own personality before the official reveal of him being Vergil's son. Plus he is similar to Vergil in some way (need someone to love him), but ended up in a better situation than Vergil because of Kyrie (and Dante).
But for Dante, I can't see how to replicate this since he don't have something like Vergil's trauma. So I can't really see the point of giving him a daughter or son. Plus like V's patron said, we can have a new female character without her being Dante's daughter. And finally, having another daughter from the Sons of Sparda would make for more family drama, and we got drama for 5 games now. It's time for the serie to take another path.
So yeah, I don't like the idee of Dante having a daughter.