She says things to me such as "I'll just do it myself because you'll not do it properly" or "If you are going to do a job for me, then at least do it properly".

Here are some other things she won't let me do:

1. She won't let me cook for her two kids (from a previous relationship)
2. She won't let me do the laundry (when I offer to help her/do it whilst she is out)
3. I have to make her meals in a certain way, otherwise she won't be happy and then she would go and make it herself