We don't know when that letter/card was written to BM. It could have been five years ago. And to me, it sounds almost pleading and like she was saying, remember what we had? I do think Suzanne was madly in love with Barry. I have serious doubts if BM loves anyone other than himself.
In his most recent interview, he floats the abduction theory again, apparently having abandoned the mountain lion theory for good. He doesn't plead for her return, he won't show his face on camera, and just to keep it classy, he insinuates her family didn't care about her.
Yep, totally the behavior of an innocent spouse.
There is a lady missing in Belle Isle FL right now, who's husband has been front and center from the get go, pleading tearfully for her return and for help and information. Apples and oranges as far as the spouse's behavior.
MOO and my speculation