My intentions were to get the DM certification before either of my sons got certified, but I never have the free time available to complete the DM course.
So when my oldest got his junior OW card at age 12 two years ago I was (and still am) only certified up to Recue Diver. My brother and I both "tagged along" for his class' checkout OW dives, just so the instructor would have more sets of adult eyes and ears with her in the water. We had no official responsibility, but as relatively experienced divers we could help keep an eye on "the herd".
After his checkout dives my son did several dives with us, off of the boat of the operator I've used for years and feel comfortable with. He does very well in the water, but when he dives with us my dive is a completely different experience - as much as I enjoy being underwater with him, I constantly keep an eye on him, and can't relax as much as I can when he's not along.
Next month, my youngest son will begin his training. Between the two of them and their mother I'll be a wreck when we dive as a family!