Parents: How would you react if...?

...you discover that your sixteen-year-old daughter has been exploring her uality with her boyfriend of three months (second relationship after dating one boy for eleven months)? I ask because I am said teenager. I have always been a "good kid." My grades are excellent (88-98%), I am involved in extra-curricular activities (school play, student's council, other involvements), I help my teachers clean up after cl when I don't have to catch the bus, I am a good and loyal friend, and I help out around the house. I have never gotten into any trouble; no smoking, no drugs, no drinking, no vandalism, etc. I am Christian, which began due to my parents' influence but has become my own pion. I have morals and values and I do my best to treat people well and and with love. I'm not perfect by any means; I have mood swings and occasional attitude issues just like any other teenager, but I truly do my best to understand why my parents do what they do. Often I listen to my parents vent about their problems and whatnot. I am mature and understand many "adult" issues. I know where my future is headed and am responsible (I intend to become an OB/GYN). Okay, now back to my question. I had been text messaging my boyfriend on my cell phone, talking about what we had done together the other day, etc. when my dad took my phone because I had to clean my room (I did). However, before he gave it back, he read my text history, which revealed that I had had with my boyfriend and he had fingered me. I apologize if that seems obscene to say...I'm not entirely sure how else to word it. My parents began to say that I should be ashamed of myself, that I can't be trusted, that I'm a delinquent, etc...my mother went as far as to say "no wonder she is popular," a statement which doesn't make sense because what I do with my boyfriend is personal, private, and intimate...something which is not shared with others. I was (and am) very hurt by my parents' reactions...it was like they now think differently of me; like I'm suddenly not as good as they thought I was. So my question is this: do you think my parents overreacted? How would you handle this situation as a parent?