Anyone who has had an affair should have STD testing. An afair, by definition is deception, and a lie. One cannot trust that the affair partner told your spouse the truth about being a virgin. Even if she did tell your husband the truth, how does one know she did not have other sorts of sexual contact with other partners? There are STD's, such as herpes and syphyllis, that can be contracted by skin to skin contact. Can one be certain that your husband had sex only with this one AP? Because there is no way to be certain the AP is telling the truth, one might consider her, and therefore your spouse, as having had sex with multiple sex partners, and therefore high risk for STDs. It is completely reasonable for you to request his getting tested for gonorrhea, chlamydia, syphyllis, (HSV type II specific IgG) herpes,trichomonas, hepatitis B, and (if born between 1945 and 1965 or other high risk factors) hepatitis C.

STD testing is really not a big deal. Most health departments do it. The gonorrhea , trichomonas, and chlamydia can be obtained from a urine specimen, and the remainder with a blood draw. It is the responsible thing for your husband to do.