After tying up Vanessa in the sauna, Terry becomes bored and decides to entertain herself by dominating the immobilized friend.
They have Blackrose, a common friend, they haven't invited to go with them. The girl finds them in the sauna. She is angry that they have forgotten about her. She comes up with the idea of paying them back. Given the fact that Vanessa is tied up yet, she decides to tie up Terry in the same way that doesn't expect something like that. It's a good way to give a memorable lesson. Never forget friends, bitches.
After tying up and gagging Terry, Blackrose leaves the sauna. Isn't it too dangerous? No worries, sauna employees will find them quickly after their paid time is over. At least, they will remember to call her next time. The bad news is that the sauna will be associated with a negative memory. Bondage is a good way for Blackrose to make friends remember her when their memory is short. A lot of people like pictures and videos where girls take punishment in the form of bondage.