i imagine lin being a smol bean, needing help with simple things like reaching the top cabinets or grabbing something from the top of the fridge. Maybe a box of cereal or something in the cabinet above the fridge that she can't just bend down to her level. so kya always has to help which lin refuses to ask for. kya comes up behind lin each time, pressing her body against the earth bender as she reached up grabbing whatever item her little lady needed. lin would blush every time because as much as she didn't want to say it, she loved when kya helped her with simple things.
Headcanon that Jason still sits like he's 4'11"
He'll curl up on the couch, sit crisscross applesauce spoons in the bowl on the chair in the batcave, and he'll try to wedge himself into small corners when he's having a menty-b
TLDR, Jason forgetting he's big