It is so simple and so hard. When get outside of ourselves and our own desires, to see, hear and feel the other, the person before us, we can respond to the moment, the situation at hand. If the intention is to connect, then we need to see the person before us.
Yet most of us grow up learning to assert ourselves as right. I learned this in working with very young children, toddlers who tend to grab from each other. When I, as the adult simply state what is going on. "Susie has it and Sarah is pulling on it" rather than "she had it first or it's her turn", it seems to me as observer, that a release takes place, the struggle is seen and the children stop pulling and work it out once they are both seen in their struggle. It is the recognition of the other that shifts the situation from conflict to connection.
Your struggle is to get their on time. Her struggle is to wait once again.
When you can see that she too is struggling and it may be hard to repeatedly wait for another person, particularly the one you are married to, then you can address her feelings and her struggle by acknowledging them.