I would at this point not invite her to church given all you've posted. If she wants to join you great, but you throwing it out there again seems to be pushy at this point.... I'd just let her be for a bit.
Here is the thing, you've put in some serious changes but your WW will be of the opinion it's all a trick, like you have a spring loaded trap to catch her and get her back into the M .... It's going to take MONTHS, maybe longer for her to accept your changes and believe they are real and will stick... Let's be honest, it's going to take you being consistent in keeping up these changes regardless if your WW buys me or not.
She fired you... The M you had is gone , from the sounds of it it's most likely better off that way. I can not stress enough that you need to focus on yourself and work to improve for you... Do the work, use the gift of time... The holidays are coming and it's going to get bumpy and if you do not have your head screwed on tight this is going to be even harder.
