Go for what you need

You would consider stopping her if you believed that this will do any good. Lea hates you for **** her friend and her opinion of you will not change should you show some restrain now. Besides you are afraid that it will be unwise to hold back your lust. It may result in you losing control again and hurt some woman. At least Lea is partly willing to give her body to you.

She doesn't waste any time striping. Her movements are fast, coordinated and determined. Her strength of character amazes you. She is ready to do what must be done and show no hesitancy. Before you can say anything about your wishes she stands right before your eyes in her birthday suit. "Can you... " It is the first time when you hear some hint of nervousness in her voice "Use this?" She shows you a condom in her hand "My pregnancy will hinder survival of our group. I have the necessary pills but they need few days to start working"

You can insist on going bare. After all the deal says that you can do anything with her body in any way you want. On other hand is it that important for you?