My Ex-mother-in-law (Mil)

At 34 I got divorced and my ex-wife went overseas to live her dream. No children and so no child support and she wanted no alimony, a clean break she said. Her mother 48 was left alone as her 2 children who now overseas and her ex-husband had moved to the other coast. So, I was actually the closest family member, albeit ex family member to her. She had been distant, towards me during my 5-year marriage to her daughter. I thought she didn't like me all that much at first, but soon realized it was her nature all along. As she was the same with most people and also somewhat with her now ex-husband, which lead to the divorce. Just before thanksgiving last year she contacted me and asked did I have any plans for thanksgiving. It was a little bit of a shock at first, but I had no plans and thought as she had called me, I should at least agree. Not expecting much and no family of my own living anywhere close. So, we had thanksgiving together and I must admit I enjoyed it quite a lot. She was somewhat more relaxed with me than she had ever been before. Before I left, she asked what I'd planned for Christmas and as I was listed to work, I had none. She again asked me to join her for Christmas and I agreed again. The evening of Christmas I went to her place for dinner and again had a great time. It was getting late and had started snowing albeit lightly, she suggested I stay as the road would be slippery. I agreed as driving home late at night wasn't high on my enjoyment list of things I wanted to do. I'd help her cleaned away everything and then she said she would shower on go to bed. I was just about to go to her spare bedroom, when she asked me to join her in the shower. Somewhat shocked at first, but I hadn't had any sex since the divorce and decided why not. With no work next day, I was able to stay with her all that day as well. Ever since then we've kept up a sexual relationship, having sex once or twice a fortnight. Last week she told me her daughter had enquired about me and said she was thinking of returning. Having had her fill of her dream, not being to her long-held expectations. Then adding I think my daughter regrets divorcing you, I was surprised by my ex-wife even asking about me. But then more about her regretting divorcing me, but I hadn't a girlfriend unless you count my ex-Mil, who is more of a friend with great benefits. If my ex-wife wants to try again, I'm opened to think about it at least.