(Lesbian) How do I come out to my religious parents?

Hi everyone! :) So, I recently found out I was les and got a girlfriend. How can I come out to my parents? They're religious and blablabla and they would hate me if they found out I was with another girl.They have told me that if they ever found out about me having sex with another girl they'd disown me. I want to be honest and talk to them but I'm afraid of what may happen. Having a relationship and sex with her has been one of the greatest things to happen in my life. I want to tell them and share the experience with them but I'm afraid that they'll hate me. What do I do?