I've always felt that his relationship with Tara was strange, they seem to be hiding something...remember he said he would marry anyone she picked, then her saying that he had picked Saloni, not she? There's definitely something wierd there...maybe she married her husband after she had an affair with Nahar earlier on?
Then again, I think he's also hiding something else...maybe he goes nuts in his sleep?
i think it's something else & something just small, not a big issue i guess, they just want viewers to keep giving some suspense & masala. so my guess is, its something else & small.