Balakrishna doesn't hold back when he's speaking from the stage. He simply says whatever comes to mind.
Today, during an event related to Bhagavant Kesari, he praised Sreeleela for a while.
He mentioned that he told Sreelekha it was fine for her to call him "chichaa" (uncle), but in their next film, they should act as the hero and heroine together.
In continuation he said, "When I shared my desire with my wife and son, my son replied, "Dad! I'm planning to become a hero and pair up with her. Nee ground floor balisindaa?".
Hearing this Sreeleela and others on stage ended up in laughter.
We don't know when Mokshagna will debut as a hero, although Balakrishna has mentioned it in some of his interviews.
Putting that aside, Mokshagna was recently seen conversing with Sreeleela during a shooting and that picture has gone viral. Mokshagna may have crush on her like any other young guy.
Regardless of the context, the remark "ground floor balisinda" is quite inappropriate as something a son says to his father.
If he indeed said that, it raises questions about their family values. If it's not true and Balakrishna made it up for entertainment, it leaves a bitter taste.