Complex sentence: Desperate to keep the romance secret, Jean allowed Tom King to believe he has a chance with her but the scam was exposed when Jean and Terry were caught getting frisky in public and marched down the nick !
Split into simpler sentences: Desperate to keep the romance secret, Jean allows Tom King to believe he has a chance with her. But the whole scam is exposed when Jean and Terry are caught getting frisky in public and marched down the nick!