Sally is scared of anal, but ends up asking for HARD ANAL SEX after a good preparation

The first time we had sex with Sally, it was in a sex party weekend. At some point I asked her if she wanted to try anal sex. She said "yes, but I'm scared". Ever since, she almost always has the same reaction when we try anal sex. She's scared, but she trusts me to be very careful and stop if needed. With this trust, fear is then a very powerful turn on for us, that leads to huge anal orgasms. It's also a question of technique. Sometimes anal sex is not that difficult, but some other other times it hurts like crazy. In these moments the one who penetrates must stop moving, and then try to move very slowly, while asking ask for permanent feedback, and even try to get a little less hard... It's one of these moments in which it is crucial to pay attention to every little reaction of your partner, and adapt. Doing that while also paying attention to your own pleasure is not easy, but we think this is the key to great sex. And you know what, practices makes perfect ;)