I think DS was not forcing her,but encouraging her and giving strength. It was already discussed and decided, but suddenly I feel Gehna developed cold feet,like many do and hence was finding reasons. If DS is not firm now it will go on.
And I don't think even a bit of push is wrong. Gehna is now alone with two kids to look after and a long life ahead.DS is already old,agree Jagan will always be there for her and they will never leave her side. But DS has seen enough world and in such cases it is always good to be self dependant. You never know what can happen tomorrow. Plus Gehna has all the capabilities, its just that she has never done it hence she is apprehensive.
Anandi and Ganga also got that push in their life in the lowest phase and it sure helped them to shine out on their own. JMO.