Sorry to read that Mustardseed. It must be so hard to have to interact with OW on such a regular basis. I am thankful that XH and I don't have kids together and I don't have to do that.
Your story made me think of something my Mum (who now has dementia) once said to me. I work in HR and there had been a difficult meeting with someone who worked on our reception. She was being oncooperative with my visitors, it was all a little tricky and I felt scared and anxious about going in there. My Mum said to go in there head held high and to not give a moments thought to this woman who thought she had any power to disrupt my day in any way! My Mum was so passionate about this and it did give me courage and help me feel better about the situation.
If you can, do try and reclaim your own personal power - who is she to disrupt your day. Don't give any of your power to her. She is nothing to you and has nothing on you.
This may or may not help, but how you say you felt resonated with me and that did help me at the time. Also, do try to anticipate a good summer, where you will interact with OW and feel calm, centred and at peace while you do this. Creative visualisation may help in this area perhaps...
Take care and I do hope things improve for you xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus