Razzle,
Your daughter sounds like a contented toddler to me. Mummy guilt (in my opinion) is responsible for many of the problems in this world. Mums generally seem to spoil the children materially due to the guilt of being a working mother. THIS DOES NO GOOD FOR THE CHILD AT ALL. I agree with peanuts - in having some special time with her on Sunday - but also create a build up to it, maybe getting her to collect things (different shapes, pasta, materials etc) through the week to create a collage on Sunday - thereby stretching the excitement of your special time. Obviously at her age you need to request items, shapes that you know she can find in the house, this way every day you are setting up a reason for you to praise her when you arrive home. As kids thrive on praise, she will probably be waiting at the door with her latest "find" when you return home.