Are you kidding?! Of course it’s possible to get AIDS from regular heterosexual intercourse. It’s more likely to be passed by a man to a woman, but it certainly is possible.
To be a little more precise, it's a good deal more difficult for a man to get HIV from "normal" sex with a woman than from gay sex.
However, transmission from the man to the woman via normal sex is quite efficient.
“Since it is nearly impossible to get aids from regular hetero sex i am guessing they did needles together or his door swings both ways, if you catch my drift.”
Yep. I suspect you are correct.
No, it’s impossible to get AIDS from any kind of sex because AIDS isn’t a virus. HIV is the virus, and it’s possible to get it from any kind of sex, although the gender of both people, along with various other risk factors, can make it change dramatically. It’s not ‘nearly impossible’ to transmit HIV during regular hetero sex (do you really think there are that many gay people in Africa?), it just not as easy as it would be to transmit it during gay sex or by sharing needles or whatever. Plus, while it may be difficult to transmit it from a woman to a man in a ‘regular’ scenario, things such as piercings, minor injuries, certain ‘kinky’ behaviours, or some medical conditions can make it quite possible. So, unless we have all the intimate details of what went on between the two it’s difficult to estimate the risk factor, and HIV mutates so quickly by now it’s going to be very difficult to tell if she did give it to him or not.