I think that this is a positive thing. Maybe, just maybe, your new acceptance of the status quo will relieve some of the "pressure" on her. Maybe this new attitude will make her feel better: better about you, better about herself, and better about the R. IMHO, only good can come of that.
You mentioned a couple of choices and a couple of potential outcomes, but let me offer another one. What if your acceptance actually improves things? It's quite possible that like Mrs. SD finding her desire when he quit asking, Mrs. Dog might rediscover hers when she perceives that the R is different/better. I wouldn't suggest that you bank on that possibility, but I wouldn't discount it either.
