Future Indian Runner Duckling Help!?

I have 2 indian runners right now a male and female I had three but one died, anyway the female (puck) layed like 17 eggs and I was pretty sure at least a few would be fertile because they "fertilize" them all the time and so I took 10 leaving some so she wouldn't be too lonely without any and she didn't seem like she would sit so I did and they can only sit on like 9 max anyway and so she kept laying until about a week after the incubator ones adn now she is sitting on 14 is this number ok? Can I introduce the incubator eggs to the mom and dad once they hatch and even when she is sitting and hers will hatch a week after? Should I wait a week after the incubator eggs hatch and hers hatch and put them all togther??? Also will the dad attack them? And because we can only keep some and have some people that want some of them at WHAT AGE SHOULD I GIVE THE BABIES AWAY and should I introduce them to the mom if im just going to end up finding new homes for some? All the help is appreciated so THANKS to everyone that responds/reads have a great day!