J.J.
Try starting to leave them for very short periods, or only when they are asleep at first. Maybe go and get lunch when they nap or grab a drink with DH after bedtime. That way, you are starting to leave them with her, but the risk is minimal. Then slowly start working. Perhaps just leave them while you grocery shop or something for short periods through the day. I understand how you feel. I am the same way. I have only left my baby with a sitter when he sleeps.