When "Valeria A." caught her fiancé fondling another girl's boobs on Facebook a few days before their wedding, she decided to get even, guerilla-style!

She and a pal printed and stuck up hundreds of posters at train stations and office blocks around the city where her fiance and their friends work.

A picture - taken from Antonio's Facebook profile - shows him nestling his head between a girl's naked boobs.

"Thank goodness there's Facebook! At least I've disovered you're a traitor pig before the wedding! Signed, your former betrothed bride and the 548 guests of our wedding," wrote Valeria, 28.

Link (Photo: EuroPics)