Dear Jawn, this is just my experience so don't know what it's worth, and it's difficult to express, but I was thinking, your wife may be trying, through therapy, to integrate her love for you (as you saw with your accident, etc) with what she is learning and coping with, including learning how to make sense of what she feels, experiences and thinks daily. I realize Thanksgiving is coming and naturally because you love and miss her and your relationship is most important to you, you are wondering about the plans for it; naturally, this is normal and very much in the present. But as regards ptsd, being able to appreciate the present sometimes get lost. Irregardless of what your wife chooses, she would probably prefer the environment of your company and relaxing (mentally and emotionally), but she will likely choose whatever limits (all) stress, depending on her family it may be necessary for her not to stay long or avoid it to a great degree. Either way it wouldn't be a reflection on you, and the less Big Deal made about it, the better. Hopefully in some way you can acknowledge and celebrate it together.
P.S- Hope you are feeling a little better!