"I only wanted him to untie me but then..." - Step Sister Bondage play Creampied

I was stuck in a bondage set up that my boyfriend tried out. My boyfriend had an emergency and left me covered with a blanked. I couldn't get out so I asked my step brother to help me. He then started playing with my feet first and then fucked missionary and in doggystyle. It felt so good that I had to let him fill me up with his warm sticky cum.