You are already realistic about your low chances of getting into a CA school given your grades. Now, you and your wife need to have a serious heart-to-heart discussion about how committed the two of you are as a family to you (as an individual) going to medical school. Medical training is a pressure cooker that can destroy a marriage even when both partners are fully committed to it. She will need to make many sacrifices along the way in order for your dream to come true, and if she's not willing to do that, it's best that you and she openly acknowledge that now, so that the two of you can decide what you want to do as a family BEFORE you start down the medical training path.
There are four basic possible outcomes, none of them ideal, and all of them requiring significant sacrifices of you, her, or both of you.
1) You get into a CA med school, which would be the best case scenario. (However, you and she need to be aware that you could still end up having to leave the state for residency in order to avoid the risk of not matching, thereby simply postponing the inevitable.)
2) You get accepted to med school OOS and go by yourself (both of you dealing with the separation effects).
3) You get accepted to med school OOS and she goes with you (her dealing with losing her support system, finding a new job, etc.).
4) You do not get accepted to med school and/or choose to do something else with your life (you dealing with not being able to achieve your dream).
As others have already said, you really need to find out what your wife's concerns are about leaving CA. Go through each of the possible scenarios I've laid out above with her, and discuss which one(s) each of you would find acceptable versus which would be absolute deal-breakers. If leaving CA is an absolute deal-breaker for her under any circumstances, then you may have a very tough choice to make between keeping your marriage versus going to medical school. I don't have any advice for you there; it's not a choice any of us would envy you having to make. But you (and she) need to go into this with your eyes open, because medical training will place significant stress on your relationship even under the best of circumstances.
Hope this helps lay out the framework for your discussion, and I wish you the best of luck.