Since the assembly elections are far off, it makes sense for Mamata to indirectly support Modi and come out openly against him once again before state assembly elections.
Modi will be happy with Mamata even if she decides to abstain from vote of confidence or other crucial finance bills in the parliament. This will also be a kind of support from Mamata to Modi. And she will also not be seen as openly supporting Narendra Modi.
It might sound a little far-fetched but politics is a game of possibilities. And nothing could be ruled out.
Modi is a very shrewd politician and he is not known to change his stand without any reason.
So don't get surprised if Modi and Mamata come up with a shocker post May 16.