I’m sleeping with my partner’s younger brother & don’t feel even slightly guilty… Because I’m getting my own back

DEAR DEIDRE: I’VE been having sex with my partner’s brother and there isn’t one part of me that feels the slightest bit of guilt. They are insanely competitive and now I’m fantasising about rubbing his nose in it and letting him know his little bro is bigger and better than him - especially in the...