It takes three months to detect HIV using the antibody test .
But if you do have sex with her without a condom , I suggest you
take PEP ( post exposure pro. ) within 72 hours . so if you really
so keen on having sex with her , like you said imprisoned her for
three months then take the HIV antibody test if negative , she is
all yours . But she gonna charged you for wrongful confinement or
if she is forced,then it's kidnap .