I somewhat disagree with many folk here.

I applaud your consideration of this concept. Kids need trusting relationships with adults who are not their parents. Yes, yes, read a parenting book etc. etc. but it is normal and desirable for kids to not want to tell mom and dad everything that they might want to talk about.

In your situation I would step back and look at the community the kids are being raised in. Are there a lot of involved, caring adults? Aunts and uncles, nannies, teachers, coaches. Talk to those people about talking with your kids. Talk to your kids about talking to those adults if they can’t talk to you.

Some of us have bigger social support communities than others. It’s okay if you don’t have a lot of those folk in your life. If possible, I would prioritize building those relationships over therapy for now. Sign the kids up for soccer or karate or the big brother/big sister program. Get them out socially and interacting with peers and adults while not under your nose (as developmentally appropriate).

If that doesn’t work or isn’t possible I do not think it’s a bad thing to try therapy and that gives you a great way to talk about how there is nothing shameful about therapy, that some people do it to feel better and some people do it to help them not feel bad.