AU where Stick died at the end of S2, Elektra and Matt don't run away, and there's reconciliation with Foggy, Karen, Claire, hell maybe even Frank. Everyone else recognizes that Stick was like a father to Elektra and Matt, and let them mourn.
However, Matt and Elektra start reminiscing about Stick...promptly horrifying everyone else as they realize that wait a minute, these weren't just kids who got martial arts training while young, they were literal child soldiers. Matt and Elektra are fondly looking back on things Stick did to train them, and everyone else is trying to convince them it was abuse.
(OP is open to Stick having sexually abused them, too, if filler would like to go that route.)
Gen, Matt and Elektra mourn Stick, to everyone else's horror
However, Matt and Elektra start reminiscing about Stick...promptly horrifying everyone else as they realize that wait a minute, these weren't just kids who got martial arts training while young, they were literal child soldiers. Matt and Elektra are fondly looking back on things Stick did to train them, and everyone else is trying to convince them it was abuse.
(OP is open to Stick having sexually abused them, too, if filler would like to go that route.)