That's really not how it works. You're most likely not going to get aids hitting it, even if you don't wear protection. The risk of transmission through intercourse is extremely low, especially female-to-male. This is taken from a website:
A study published in 1994 in The New England Journal of Medicine looked at 256 heterosexual mixed status couples. Of the 124 couples that consistently used condoms, none of the HIV-negative partners were infected. Among the 121 couples that did not consistently use condoms, 12 (about 10 percent) of the HIV-negative partners became infected. Additional studies found similar results.
She has Aids? Man that sucks. Not sure if i could hit it knowing the risk. She is fine as hell too