Those wondering about Vidya Balan's marriage in trouble ought to put a lid on it. The curvy actor and National Award winner couldn't be happier as she threw a dinner party for her husband, film producer Siddharth Roy Kapur at a posh restaurant by the Gateway of India, reports Mumbaimirror.com. The small but elegant soiree saw a number of their close friends - very few from the industry though. However, the appearance of one couple did have the collective nudge-nudge-wink-wink from the crowd. The beauteous Karisma Kapoor, who has often denied being involved with businessman Sandeep Toshniwal, came with her beau in tow. Toshniwal and Roy Kapur are buddies from school, they both attended a Cuffe Parade institution as children. Karisma and he did make for a loved-up couple, and will be one officially, the report stated. Except that Toshniwal is currently in a maintenance battle with his with his wife, the report concluded.