BG-you don't know that. You also dont' really know if she is threatening to keep S from him. That is kinda why I said to take a little time to see if he can show you that he wants you without involving S. Of course then he tried to buy you so...
Something is still not out in the open. He is playing games that just don't make too much sense now that you know, unless the whole time he really wanted you to make the choice and you didn't make the one he thought you would. But I don't think that is it or he would have pushed this button a long time ago.
If you focus on the past, you ruin the future. You can only live for today.