Kazhukan

Velu (Jayan), a rowdy who assaulted people for money, & Malathi (Shubha), a prostitute, form an odd bond of friendship which later turns into love. They decide to quit their bad ways & turn over a new leaf, but, Velu's stepbrother Gopi (Sukumaran), a serial womanizer & who had no love for Velu, doesn't let them be. Gopi, who happened to be an old customer of Malathi, takes a fancy to her again, & demands she sleep with him. When she rejects him, Gopi exacts revenge by raping a pregnant Malathi. (Summary by iceblox)