No. You don’t get it. My daughter is only 3 and my 2nd child should be born in December.
My daughter doesn’t need to know that her uncles and aunts didn’t receive dispensation from the Bishop to get married. At least now while she is young and impressionable, or ever for that matter.
That’s one of the fastest ways to raise an atheist or Protestant… Telling them that the nice aunt or uncle they have are living in mortal sin because they don’t have a dispensation. The child has to understand and believe the teachings of the Church first.
Children can learn from the sins of the past without always knowing the full details. For example, I never knew until my twenties that my grandmother got married after she was pregnant. No one told me. I always knew she wore a gray suit on her wedding day, but I actually thought getting married in a gray suit was common for women back in the late 1940s!
What a child doesn’t know about the private lives of adults can’t hurt them. You still teach your children that adultery is evil, but you don’t have to point out every adulteress and fornicator to them.
However, it’s a totally different story if they find out or realize the situation. Then, it must be dealt with properly and with love.
As for my mother-in-law, I have no idea what we are going to do because my wife doesn’t believe that her mother is doing anything bad (my wife isn’t Catholic).
A parent can hide a family member’s invalid marriage due to lack of Catholic form, but you can’t hide a divorce or a couple living together outside of marriage.
Finally, this is why sexual sin is soooooo bad. It brings scandal to children. And for those who are not married, remember you don’t just marry your spouse, your marry his/her family too. Those people will have an influence on your children for ever.