I'm sure that Fleur loves her children (especially doing mini-me stuff with River), but I think she does motherhood on her own terms, as she has always done pretty much everything. She was never the most enthusiastic about the pregnancy and infant stage (apart from the freebies, obviously), and I don't particularly have a problem with that – not every woman is suited to motherhood, and the kind of super-involved parenting that is considered normal now was never normal for rich people. Fleur herself went to a boarding school, and her family isn't even that rich compared to Mike's.
I don't have children because I'm not at all maternal (except towards my cat, who is naturally my perfect sweet angel baby

), but I think it was expected that Fleur would have at least a couple, and she's said lots of times in vlogs that Mike wanted a son. I'm sure her children know that they're loved and have lots of family around them with the grandparents still being alive and various cousins, etc., not to mention the kind of lifestyle and opportunities in life that most parents could only dream of giving their children. Fleur has always been all about Fleur and I don't think that will change now.