I dunno, I think "closure" is overrated, and it also presumes that both parties are firing on all cylinders, so to speak. IOW, she may very well get NO sense of closure because she is an alcoholic and not thinking correctly.
If you are sure that it won't suck you back in, then there may not be much harm, but it may not do much good, either. Sometimes the cleanest breaks are the, well, cleanest.