Am very interested in the development of the 2nd side job - but believe Sophia has only talked on the phone with the lady once so don't think that would be a very familiar face to her. Regarding Alyssa, since the two of them have talked and hung out at least once (coffee) am sure the basic conversation between two people of "what do you do" would have come up and therefore Sophia would know if Alyssa worked at a tanning salon and it would not be a surprise. Guess that's why a "very familiar face" leads back to a student who she would see every day/week at school.
It is fun speculating though.