We all have down spurts along with our creative spurts. What if you try 'giving' yourself a quilting day every once in a while. If your guild has a quilting all day event, sign up and tell your children's dad he will be parenting that day.
Or send the kids to grandma's for the day and tell hubs that you're going in your sewing room and not coming out. He may bring food and drink but otherwise is to leave you alone.
Trying to squeeze quilting in on a daily basis while raising children and working is hard. I find it easier to book blocks of time for me. Then the pressure is off, and the creativity flows better.