Ah, don't love your husband? Husband doesn't love you? Where's that biological bond?

If all you care about is the biological bond, what makes you a "human" animal? A lot of mother's eat their young rather than protecting and caring for them? No one can care for and love another without a biological bond? I know you don't seriously think it wouldn't hurt your T if you left her. Not in the same sense it hurts you that your mother gave you away or that your adopted mother mostly wanted you for her own purposes but T (and most of the other friends, mothers, and lovers in the world) are not like mother or adopted mother.

T isn't supposed to fill the hole. She's supposed to help hand you tools and witness your filling the hole. It's your hole!