My wife and I have been pretty mindful about what we share on even quasi-public social networks when it relates to our kids. Luckily there's a decent number of platforms/apps out there which make it easy to share with family without making stuff public.
Sadly that doesn't stop family from reposting from those more private platforms to public social media...
The one we ended up settling on was Family Album. It's been a pretty good platform and a lot of our family didn't have a problem getting on it. We've been using it for several years now. Prints purchased through the platform have generally been top notch as well.
Sadly that doesn't stop family from reposting from those more private platforms to public social media...