I know this goes without saying, but- I'm saying it.

Be careful. Please. [ the heaviest! weight! to that sentence! because she knows what shadow travel can do to a person, remembers seeing visions of demigods from the past, the ancient past, before the big three were ( technically ) not supposed to have kids anymore. the way they would drift into shadow and never turn back.

she also remembers a very sleepy Nico, too ]

Teaching it isn't the same as abusing it, but it could be just as taxing.