I would tell her but in a "matter of fact" kind of way. Like...

Oh BTW, I heard that the OM was fooling around with another woman at his place and his son caught them. Just thought you should know. Gotta go.

Then leave before she can ask any questions.

I think the topless woman was sent by God! Maybe she was an angel in disguise.

M-43 W-40
2D - 9 and 5

Emotion, yet peace.
Ignorance, yet knowledge.
Passion, yet serenity.
Chaos, yet harmony.
Death, yet a new life.

RECONCILED AND WISER