are you wrong? hhhhmmmmm let's think about that for a moment.
Lying, cheating, deceit......I imagine you could say you are wrong.
Make the break with your girlfriend and move along. Meet brother and his GF somewhere else and keep it on the down-low. Or just be honest with your clit-licker (also my favorite hobby) and tell her the truth. Be prepared however for her to go absolutely totally fucking Ballistic.
Good Luck and Good fucking babe
" I WANT TO HAVE HIS BABY AND TELL HER ITS HERS BY THE SURGERY WE DID A COUPLE MONTHS AGO." This is just baffling to me--did they give you her ovaries? That's the only way a baby that pops out of you could be her's, as far as I know, from a surgery that was done more than a month ago.