My DH got in touch with his ex girlfriend a couple of months ago. He said we were having marriage trouble, and asked if they could be in touch "discreetly". They then sent each other hundreds of texts over the next six weeks, mostly late at night (due to work absences/demands and co-sleeping with small DC2 DH and I have mostly been in separate beds recently). DH claims the texts were innocent, but deleted them all, so I don't know if that's true.
DH and I are working through this with counselling etc. But I know his ex (have met her a few times) and think she's been an utter arse about this too. WIBU to email her, politely, to tell her that - in her position - I would have behaved very differently? She's got form on this, having had a three-year affair with someone else's husband, so I feel particularly strongly that I want her to know that she's really upset me. My draft email isn't arsey at all (e.g. I don't mention her previous affair), but I'm wondering if it's stupid to send something at all.