Brinjal - hand pollination

Hmm.... I realised something today... never ending learning & realisation from my plants!!! LOL.... I think (!!) if the pollination is successful, the flower stem (not sure if it is called stem - I am refering to the part where it holds the flower petals!) will grow bigger. I noticed that one of the flower stem (where the flowers has withered) has bulged a little compared to the flowering one.... see below for the bulging one..... This is the flower stem with a still-flowering flower...