Jessicas black costume is for her solo series. She uses the classic for superhero work and the Jacket for PI work.
In Origin she went under at the age of 7 or so and woke up biologically 17. Hydra told Jess 10 years. This implies they lied to her and it was longer than that, since Michael is apparently physically older than Jess even though he was born after her.
And Miles Warren has been tied to Jess since Spider-Woman Origin it was only just now that anyone did anything with that dangling thread.
Issue #1 is on Marvel unlimited this week so here's Marvel's recommended reading list