Hey what is the update? Any progress from your last post?
Unfortunately, I can see things from her point of view that by moving away is an easy option for you but will be hard for you to conduct a rel with your child and will result in her having no respite... basically she needs a break occassionally.
It is progress that she is spending more time with you etc but your issue is, is that you're over analysing everything she does. The thing is, if you have been together for 11yrs she should know how your mind works. You should do nothing about her sister, it will not help you mentioning it and may push her away a bit again. From her sis's point of view, someone she cares about has taken the descision, however hard/easy to walk away from a long term rel and she is trying to make her happy and help her be able to come to terms with things. If your ex is going to get with someone else... then it will happen.
Now your finances are starting to shape up have you thought about making some lifestyle changes, poss join the gym or a club, this often gives ppl a new lease of life and a re-newed self-esteem. It will also give you something different to talk to her about. I think she would be very impressed. I speak from experience when I say that she is still recovering from the birth of your son. She could have been suffering from Post Natal Depression or anything. I think the fact you've sorted your finances out will be a relief to her as well. Another idea would be to 'woo' her, send her flowers, chocolates, a card, ask her how she would feel if you saved up to take her somewhere nice for Valentine's, whether she would feel it is an appropriate gesture. Tell her you'd like the opportunity to let her remember why she fell in love with you in the first place. Ask her if she'll allow you to try and make her feel like a queen or the most important, beautiful woman in the world.
You can't make someone fall back in love with you, all you can do is have hope. Tell her that you feel it has been long enough and you would like to know whether she feels there is a chance you have a future together. If she says no then you have to start accepting things as they are and start moving on with your life xjx