Go tuck it away outside somewhere and let it do it's thing. YOU DO NOT WANT POLLEN IN YOUR HOUSE!
It floats through the air, and clings....all your plants will get pollinated. It can also go into the AC system, it's not even worth the risk...put it outside somewhere where nobody will find it.
I have a kushberry strain that is known for doing this, if I let it go the full 10 - 12 weeks like I want to, it will grow those everywhere. Good for making feminized seeds, every seed that will be on that plant will be 100% female. What you have there is a genetic asexual plant, that is not actually a hermie. A hermie will clearly express male flowers at the nodes of the plant, and it will create hermie seeds. What you are seeing there is not that, banana's growing from the flower section is a genetic trait. It's also a trait that can skip generations, meaning the resulting seeds may be worth keeping.