Translation:She has three grandsons and five granddaughters.
Yes, but for some dumb reason DL will still mark it wrong if you use "grandkids" here. -_-
I would prefer Enkeltochter/Enkeltöchter and in relation to that Enkelsohn/Enkelsöhne here. They sound better. "Enkelinnen" is half a word full of senseless gender ending. Well not senseless but still a bit too long for my taste.