Yes, absolutely. My neighbor had a stoke (actually think it might have been a brain anuerism) and when she could walk again, he was out the door. She has a mind of an 8 year old now. I thought it was sick that somebody could do that to the one they love.
In some cases the paralyzed person can become very bitter and hateful and at times abusive(physically and/or verbally). I have seen this situation first hand and hold no ill will towards the wife leaving the husband. This scenario actually happened to a friend of mine after his dad became a quadrapalegic(sp?) from a car accident.
Disagree, if you walk out just because of the crippling injury then you are kind of a twat, but if the person becomes hateful and abusive fuck em, let them wallow in their own self pity.