How do we know we have given enough quality time for our children?

I know how you feel. I am a single parent, I also have the same predicament of not spending quality time with my three (3) children. I believe that the time we spent with our kids are quality time. This is because we are giving them this few hours and they are our only concern. In the few hours that we spent with our kids, we are focused on the fun that we can give them and we communicate with them. Its the quality and not the quantity. There are families who have lots of spare time, but once you ask them, even though they are at home, they are focused on work, other curricular activities, or just busy with whatever business they have. I pity those children who are in this situation. Don't pressure yourself, just let your child understand your family situation and I know she will not question you in the end. Children basically are seeking their parents attention, their whims are just their way of being extra sweet to you, although if they can get their way they will be very happy for that. Make the few hours that you spend with your child be full of fun and learning for her. Show her how much you love her and care for her, assure her that even if you are often times late in going home, you love her so much and maybe small suprises everyday or anything that will make your kid smile will help (chocolates, biscuits, etc.)