If you get into, "oh poop" and take over, I will say.....your choice of handing it back. But......must have a definitive "your ship" followed by a, "my ship"..,.....otherwise, still YOUR ship even if you didn't state it but made it sorta clear by yanking controls.
Still comes down to.....PIC is in charge of the flight........sudden stuff may make it hard to do a formal control handoff.
Your goal as PIC is ensure a safe outcome....discussion/argument can happen after any landing and you walk away.

****er is when 2 highly rated pilots in the ship. One thinks it's OK, one is scared.......welp.....get on the ground (hopefully safely).....then discuss.....maybe a few beers are required......hopefully no police involved.......;-)