I have two children, but only one is quite dependent on me as she's still very young. Her big sister sometimes keeps her occupied with games, and the two are often inseparable so I can trust them to play nicely. I've had to afk a few times to deal with a few minor issues between the two, and I rarely spend more than a couple of hours on the game at a time unless the kids are at school / playgroup.

Most of my play time is in the evenings, when the youngest is in bed and the eldest is winding down or doing her homework. They always take the highest priority with me though. There will always be another day to complete that raid, but time with the family is priceless.