Though I'm not watching show anymore but have an explanation between 2 different behavior of vansh π if he is truly handling his wife calmly then he learnt his lesson from his mistakes & somehow he now understands ridhima's eagerness to know about past specially which is related with him & her parents that he could not figure out because those times there was love but trust from his side but these times both are there on ridhima. Hence he is calmly handling her. Now from ridhima's side seems that she won't ever learn from her mistakes.
One progress I see in Riddhima is that...unlike previous days, she has begun to be upfront.
She told him she went to juvenile centre...n she will find the truth, etc. She is hiding less n talking more.