I m married n so is my girl friend. . all our partners are are not infected by hiv or aids. having inter course with two uninfected person is safe?

Hard to know!: It's a relief that nobody is HIV positive, though a recent exposure might not "show up" on a test. Have you been tested for gonorrhea or chlamydia? These two common stds may occur without symptoms. You didn't mention herpes, but it is certainly possible for a personal to carry the virus and not know it - meaning you could get it and transfer to your spouse! get fully screened if polyamorous.

Check : It is better you both should be check for HIV as your partners sexual partners history you don't have it, whenever doubt make sure to rule out and always protection is better.