Maybe I misread, whatisis, but I don't think stubborn's S is going to avoid contact w/ OW during this sabbatical. I think she's going to be playing house w/ OW. Am I right, stubborn?
Honey, I'm sorry you're still in this sitch. No one deserves to be treated like this. How are YOU doing? How's YOUR self-esteem? What are you doing for YOU? Do you remember how great you are and what wonderful attributes you bring to the table? Are you letting 'S w/ head up a$$' affect your confidence and hopes and dreams? Put yourself first. Do what you need to do. Set some boundaries. Your S does need to see what life is like w/o you. Does that mean she'll come home? Maybe not. But, you deserve to not be in this limboland forever. I'm sorry that hurts. But, enough is enough. Stand up for yourself. You're a wonderful, kind, smart woman who is putting up with more than anyone should ever be asked. I was there so I can understand and relate. But, honey, it's time. There are no 'mistakes' if you are acting from your heart.
So... tell D8 that S has been needing some time to herself and will be house-sitting. Let her know that she can talk to S every night if she wishes as S is not trying to get space from her.
She needs to live reality. And this is your chance to breathe again. TO live again w/o having to watch your words. To be able to let down your guard just a little bit. So enjoy that. You're doing great. But put yourself first. Love your girl. ANd breathe.