I've told him that the whole thing makes me sick, and that I'm terrified he's going to leave me ("No way,") or that he will get her pregnant (she wants to have kids soon) or get a disease. He started thinking about disease, and even though they'd just been kissing, he got freaked out enough that he actually went out and had a herpes 1 and 2 test done.
The chances are about 95% that they've done much more than kissing, based on your posts here, your posts on the Infidelity forum, and the fact that he ran out and had those tests done.
