thanks so much for giving this such considered thought everyone. I really appreciate the ideas and reflections made.
ok, so I have some options:
a) mind my own business and do nothing- their relationship (husband and wife) with unravel over time either for the better or worse-
However this option means husband has further time to decieve and disempower wife. She is going to continue to fully invest in a marriage which he abuses.
others spectate whilst she is non the wiser.
The thing with this is that i do feel as if I am colluding with the affair- I know about it, we all do and how can we sit back? If this were happening to me I'd want to know. I'd want to rage/grieve e.t.c and if possible move on to a more truthful life.
I don't believe she knows already. She is in love with her husband and he has clearly managed to enable her to falsely trust OW.
Trouble is I have invested my emotions in this and so my judgement is misted by my own feelings. However, those of you who have been there agree that living in truth- no matter how painful is preferable.
b) try to find someone who is in a better position to put wife in the picture i.e. ? find original e-mailer (although person I think did it has been 'let go')
c)befriend wife and drop seeds of doubt (don't like this- would feel duplicitious somehow as I have a firm agenda behind 'friendship). However have firm grounds for being in touch- she has continually given me hand-me-downs for my children and invites my DP and I to parties (we never go). I could get in touch as a personal thank you is due and it would be my pleasure to slag off give my opinion on OW to see whether she suspects- and if she doesn't then I could point her in general direction. (oh so scary).
d) tell her outright (shitting myself about this) and whatever happens next at least she knows what everyone else does about her husbands exploits.
e) let her know anonamously. However, this leaves her very much alone, without the support/ punch bag she is likely to need once in receipt of awful truth.
I do need to be mindful of DP's position at work. His work colleagues would be supportive of wife knowing as think husbands behaviour is terrible. All feel 'sullied' by situation. In someways they have all been victims of it as many 'work events' it seems were planned mainly as an exuse for husband to end up with OW for evening. He has openly said to the other men at work when they expressed how awful they felt for the wife (who often calls in at work)that they were 'only moaning because they couldn't get any themselves and that they would given half the chance.'
However, I know it wouldn't be clear cut and DP would be right in the middle of the fall out- rocks would be thrown his way undoubtedly by husband/OW.
you are right that my first loyalty is to my DP- that's why I haven't done anything to date.
going to keep thinking...