It would depend on the fathers.

There is a theory that women are attracted to more macho men when they are fertile. This means there's actually a possibility that a daughter who sleeps around when the mood takes her would have stronger, healthier kids than one who is faithful to her nice normal Nigel.

The other side of that is that kids who have a step dad have terrible outcomes on average, and single mothers not that much better.

So what you'd really want for the healthiest grandkids is a daughter who is so deceptive she can sleep with Chad once a month and keep her safe Nigel completely obvious to the fact none of their kids are actually his.

However this isn't how real life plays out. Most slutty women have terrible taste in men. This is because they act the way they do as they are desperate for love, not due to sexual instinct. So they are more likely to have a row of weak, skinny, scumbag fathers who no other woman would even look at and kids just as useless.