its probably too late for tonight, but expect that she is going to reject you. How you respond is the key. Even if you do it 'right' she is still not likely to go along with it... yet.
immediate gratification is not the point of the action.
The point is for uou to deal with her rejection and let her think about her rejection. Right now you have taught Mrs.HD to use sex as a carrot. Thats why she brings up 'I was ..blahblahblah...but you..blahblahblah.' Sex is not a carrot.