My dad is having an affair

[Beepwizz]

My parents have been happily married for 36 years. This week I have discovered my dad is 'working away' every other week (he's retired but writing a book). I snooped on his computer and he is meeting a women for sex it seems ( it didn't take more than 2 minutes of history browsing to discover this).

Oh help what do I do? My brother has asked him in an email if he is having an affair... He avoided the question in his reply. Should I wade in with a passive aggressive text ( he is currently 'working away'). I am making myself ill with the stress of the knowledge I have. What's worse ... A bit explosion or turning a blind eye.

What JeanSeberg said. It is meddling. You can only know snapshots of your parents' relationship and as OneMoreChap said, you risk alienating yourself from both parents.

... and it's nothing like not being told when you're walking around with your skirt tucked into your knickers!

My view is that women are really intuitive and the mother possibly knows already. I don't think it's right of her to speak to her child(ren) about her relationship actually, children are not friends and shouldn't be offloaded onto. I think that OP should tell her father that she knows and tell him what her own views are if she wants to do that. She hasn't the right to tell him to end the affair or how she thinks her father should handle his relationship with her mother.

LyingWitch I used the skirt example because it is something which would be humiliating if everyone else knew and I didn't (although obv very trivial by comparison). Why would I want to be the last to know if I was being cheated on? It would be humiliating. And I used the disease example because if unaware of being cheated on I might be practising unsafe sex and at risk without realising it. If my marriage was in trouble I would want to know as soon as poss.

Hooked. You have no way of knowing that her marriage is in danger or if they even have sex. It could be something she is well aware of and has chosen to live with.
Should not meddle!!