I've disappointed my sister?

My sister said she wanted us to have an open relationship before she left with her husband out of state again. I told her last night that I lost my virginity and I completely didn't get the response I was expecting. She started crying and said I disappointed her. Saying how I did something stupid and she was expecting more from me and she thought I'd be smarter than that. I'm actually really hurt that she said I disappointed her, she's done extremely crazy things in her life that's has had an EXTREME impact on me and the family and I've never once said she's disappointed me. I understand she was worried from an older sisters POV but it still really hurt. I honestly thought she'd be a little more lenient instead of saying I disappointed her. Idk how to feel, am I in the wrong for feeling like this?