I turned into bi after had a threesome

Last week, I had a threesome with a couple. They were lovely and it wasn't their first time doing it I could tell. They were very familiar with the process and very attentive to me. I am a woman and I have beening a heterosexual for my whole life. It is due to that experience, I think I am a bi now.
I enjoy kissing his wife and make out with her. It was exciting. It was an experience that I have never been through. I hate to admit but I love it. Having threesome with swinger couple is wonderful.