You are looking at some great sensi if you dont have a male at all, but if you are looking to get more seeds you will need to keep a male plant, the polen from the male plant will pollenate the female plant, if you let it go too far all you will get at harvest is seeds, but if it is done right you will get some bud and some seed.
Once you have a good stockpile of female plants and plenty of seeds you may want to remove the male plant from the area so that all of your ladies will remain virgins so that you do not have all of those seeds in your beautiful buds.