Oh, I agree it is difficult to think straight. The thought of impregnating a woman one loves is overpowering. It must be so amazing for your brother to fill you with his cum. You should let him do that every time, but make a video of him, with his cock in your pussy, promising to look after you if you become pregnant. Then put that video someplace safe.
And then.... let him fill you with cum over and over. :)
