Awhile back I wrote a story about my gf and I in a MFM scenario. I showed it to her one day and she loved it. She said she had to masturbate after I sent it to her. Since then I have started working in some of the fantasy with her while we are having sex. I bought a dildo to use on her, she thinks it's fine but would much rather have my cock inside her. She has sucked on it while I fuck her and she always cums quick when we are doing that. Recently she has been asking to read the story while I eat her out. This always make her extremely wet and we have amazing sex afterwards. She has started asking me during sex if I would like watching her have sex with another man and it turns me on so much. I tell her I would love to see her ride on another man's cock. Last night after reading my story she asked me if I would let another man finish inside her and in the moment I told her I would and that I would love to fuck her cum filled pussy after. This had both of us about to finish instantly. She has really been getting into the dirty talk while we have sex but in the morning after she always says that she isn't sure and that she doesn't know if she would really want to do that. I feel like I am having the best sex of my life right now and would love to try it with her. How can I help guide her past her hesitation? I think she would really enjoy it in the moment but the idea of arrangements stresses her out. What can I do to make her feel more at ease?