Well, I don't know what kind of marks she had, but I'm assuming they were scars. If they were fully healed, you have nothing to worry about from those.
You had protected sex, for a short time, so that's not really a concern.
You could get syphilis or gonorrhea from the unprotected oral sex. You could also get herpes type 1 from that, but if you've ever had a cold sore, you don't need to worry about it. You can test for gonorrhea about a week after the encounter, and syphilis can take up to 6 weeks to show on a test.
If you are worried about infecting your wife, why would you have sex with another woman? That is contradicting your concern for your wife.
AJ