If my son turned out to be a horrible, murdering rapist, I would still love him. He would still be my son, nothing can ever change that. I might be sickened by his acts, I might wish that I had been a better mother or prevented what he'd done and I'd SURE as heck feel guilt for still loving someone that could do such vile things.
But I would still love him. It's hard-wired into me. He's my baby and always will be.