To be in an environment where someone is constantly irritating you is to invite stress into your life where none need exist. Therefore, my advice is to be judicious regarding how much time you spend in your DH's ex-wife. There's a limit to the amount of reminiscing one can stand. Personally, I become inwardly irritated when one of my stepdaughters who has always been jealous of me and my biological children, brings up the relationship (which died 30 years ago) between her parents, as I know it's only being done to try to annoy me. I either ignore such comments or say something like 'oh you must have been a very small child' , 'that must have been a very long time ago'. My other SD who I spend much more time with and who has never seemed to suffer with the same jealousy doesn't seem to feel the need to refer to events before I met her father, at least not in my company. On the flip side, my first husband died suddenly a good few years ago and his second wife banned me from his funeral. My mother in law took her to task, pointing out that she had been with him for 11 years only, and that he'd had a long and happy marriage with me for 28 years before that, and that our children needed my support on the occasion of his funeral, and not hers. The second wife backed down and allowed me to attend. Interestingly, all his friends were also mine, and had heard that I had initially been told I couldn't attend. They thought it was ridiculous. So I see the problem from the position of first wife, and second wife. Basically, everyone needs to be sensitive to the other wife's needs, but if I had one in my face continually I would remove myself from the arena or be upfront and ask why she felt the need to continually speak of her time with my husband, and whether she was unhappy in her current situation, and was making a bid to gain my husband back. This might show her how silly her behaviour looks.