Well, when a Mommie plant and a Daddy plant like each other they get together and make a little baby seed (in the bible belt, only after they are married!). LOL, maybe a stray bit of pollen was floating around or drifted in, or may be, a female plant can make a seed when it is 'stressed' by the lack of pollination? If it is an immaculate conception, You should plant it and start building the shrine and get some candles ordered to sell to the pilgrims, have some tee-shirts printed.....