Interesting situation.
Well first I would wait to hear it from her directly. I am not saying that your sponsor is not telling the truth I am just saying that IMO it is always best to wait and hear it directly from the source.
And if she does ask you to be her NA sponsor, explain to her just what you explained here in your post that you are not comfortable being your sponsors sponsor.
But until she asks you herself, pray about it and ask your HP what it is you should do.
Congrats to you for your 20 months being clean!! and off sugar that is awesome and those 70 lbs!!!
