I'm right there with you derby. Maybe this is all she is capable of. Maybe her idea of "girlfriend" is different than yours. Maybe your husbands idea of "girlfriend" is also. There are all kinds of relationships and althought it might be frustrating to understand, it just is.
I would wonder what is behind it for you? Do you need a break? Would you like her to take a share in responsibilities? It might be that changing your view on her and what they have, what expectations you have as a result, will help you be less frustrated and hurt on his behalf.
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