EXCUSE me sir, but you said in your very FIRST POST that you are 15 years older than your W, not 12.
And I believe you said you took her in when she was 16.
I understand the backpedling now--I really do. This was not a normal courtship.
This was not an R gone into by two consenting adults. This was an R destined to crumble and fail--it's not built on mutual love and respect. You may have had the feeling, being an adult. But she wasn't. You just are not going to get away from that fact. This R was built on other things--I am not going to guess, but I bet in therapy you may learn you liked the control you had when she was young. You liked the fact that really you didn't have to court her. There are plenty of "other reasons" to get into an R like this. Decent men DON'T want to build an R on this type of foundation. But you did.
You never answered me--I take it you didn't educate her then?