In the beginning episodes i thought she was a comic relief or nut case in that house bcz her certain harkattein were so. But ever since shagun track started she turned out to be a complete EVIL...so sad...
coming to Mohan:
Mohan is portrayed as a very lovable sweetheart who can hardly hate or hurt anyone(atleast that's what I cud understand of his character)...
So,I assume him as a very loving husband...I DONT think he HATES his wife ,though,surely he DISAPPROVES her CERTAIN behaviors(being loudmouth,buzzing around his ear talking ill about his family members...)And that doesn't mean he is NEVER comfortable with or close to her...
His excuses/reasons for not wanting a baby soon can be something else like:
1.his fear that Rama won't be a good mother.
2.doesnt want to bring a MASOOM to this horribly overstrict atmosphere.( which I strongly believe)