corrie nymphet tina o'brien plays schoolgirl mum sarah platt in britain's longest running soap when tina discovers partner todd is gay she hops into bed with his brother  how's that for revenge? * tina is 21 but looks 17 - the age of her corrie street character - yet she's done bikini stuff for FHM & other LADS' MAGS  and in real life she lives with her corrie street lover so tina is a BIG GIRL now - fair game for tv totty just as well coz right now tina's hot...