What's Going on With Gawaine?

Gawaine is trapped in the middle of a weird game, and everyone seems to be in on the game, except him. The lady comes back to see gawaine to try and seduce him again. She also offers him a sash that she says will protect him from attack by green night. He keeps the sash but hides it so he doesn't tell bertela or bertilac what's going on. Gawaine then goes out to find the green chapel, where he finds the green knight waiting for him with an axe. But underneath his mask was bertelac who had been playing a trick on goaines. And at the end of the