I'll let someone else speak to the conclusivity of the test, but keep in mind that you could even have an allergy to something on the bedding or even in the bath products she uses. There are many different possibilities.View Thread
A little additional info: It looks like HSV1 can be spread to the partner's genitals if one partner has a cold sore on the mouth and performs oral sex, so it's a good idea to use protection if one partner has lesions.
To quote the slideshow:
HSV spreads through body fluids. The cold sore virus is usually present on an infected person's lip, even if there's no obvious sore. So the main way it is transmitted is by kissing. Because HSV-1 can also live in saliva, sharing kitchen utensils or drinking glasses can also allow infection. Oral sex can lead to HSV-1 infection of the partner's genitals. View Thread
Herpes simplex viruses -- more commonly known as herpes -- are categorized into two types: herpes type 1 (HSV-1, or oral herpes) and herpes type 2 (HSV-2, or genital herpes). Most commonly, herpes type 1 causes sores around the mouth and lips (sometimes called fever blisters or cold sores). HSV-1 can cause genital herpes, but most cases of genital herpes are caused by herpes type 2. In HSV-2, the infected person may have sores around the genitals or rectum. Although HSV-2 sores may occur in other locations, these sores usually are found below the waist.
Herpes simplex type 1, which is transmitted through oral secretions or sores on the skin, can be spread through kissing or sharing objects such as toothbrushes or eating utensils.View Thread
Cold sores or fever blisters are caused by Herpes Simplex 1, which is carried by nearly everyone. It's quite different than Herpes Simplex 2, which is the one people worry about. They can be contagous but if you have ever had a cold sore, you already have HSV1.View Thread