Hi, double...It concerns me that you say you had not engaged in sexual relations before this episode with the fella last evening, since you were raped at an early age! And you characterize this a "casual sex"...
First of all, at 23, you are an adult, and can do whatever you choose, without revealing every little thing to your father. At the same time, I'm concerned for your emotional welfare regarding this sexual encounter. Are you okay with how things transpired. I know in my own long experience, I tend to have anxiety over casual sexual encounters and can't do it..."been there, done that," only to reap hurtful rewards afterward.
Please take care of yourself.
Patty