When he goes back home, excluding a few people that know he’s a world traveler, he only leaves a letter to people in his clan or people important to him explaining that he’s retiring temporarily to take care of some family matters... without saying he’s from another world, that is.
Stephanie was not in his clan, but had been eagerly waiting for an invitation from him, and would have willingly dropped everything to join. Instead, she receives one such letter.
ON THE CONTRARY, that Eunice bitch doesn’t receive a letter at all, and she’s left wondering if hers was lost by the mail delivery service somehow.