How sad for you. My husband respects our wedding vows...you know "in sickness" as well as in health. By the same token I couldn't kill my husband just because he got sick and became inconvenient to me. I wish you luck with your marriage.
Terri isn't just sick. She basically died 15 years ago, except for having a feeding tube which keeps her "alive". Do you even know what PVS is? Google it (spell it out) and then ask your husband if he would wish to be kept alive by a life saving tube.
I've never met anyone who would.