And as for phone calls and he behaving oddly,it might be the inspector calling regarding Sadhana's shooting/he knows the culprit now but doesn't want to disclose to anyone cos he wants to catch them/as someone suggested it might be cos he has some health reasons and doesn't want Ragini to know.So many possibilities and I for one doesn't think he is cheating and that too with Sonia whom he hates for the way she used him.