Yes, and it's especially sad too, because as others said, it's risking a real relationship for something so silly as "I put on my wizard hat, I cast lvl 3 eroticism, etc"
Speaking from experince then, Rye-chuuuuuuuuuuuuu!?
Yeah seriously. No one thought anything about wizards and magic levels until you mentioned it in great detail...
Anyway, yeah course its infidelity, and pretty disturbing.