Sorry just reread your post and saw the ages of your children. If you do continue to visit, like I said 30 minutes is probably about all that will be well tolerated. 2 hours is way too long for most people living without small children around, let alone someone who is sick. When you live with small children you forget how peaceful and quiet it is without them. It's like a tornado came through my house after they leave in many ways, and I love them but I need to rest just from the roar of all the activity. That's a best part of being a grandparent. You get to enjoy them, then they go home.