Am I really a monster?

My youngest sister and I just got in a huge fight and usually we are cool and get alone good and ever since I told my friends they get weird. I got this girl pregnant about 5-6 weeks ago; first she wanted to have the kid and I was trying to get her to have an abortion because I was going to drop out of high school to go on tour with my band and I didn't want to spend any of the band money on her kid. Then when I told my parents they freaked out and had my Mazda sold and they bought me some crappy USED 4 door Tarus that said would be better if I have to transport a kid in; they also wanted me to get job after school and said if I did quit school they would sell my half stack, effects pedells, mics, and all but my acoustic guitar that they GAVE to ME. Well after they sold my car I got my friend to load all my gear in his truck and took it to this guy I know's house for storage. My band mates and I haven't gone to school for the past couple of days because we are going on tour in 2 weeks. i was talking on the phone with my friend saying how awesome its gong to be without school and parents and riding around in my guitarists van drinking and playing shows and my sister over heard and got pissed off and said that she doesnt have a brother and that i'm a monster for not providing for the kid and stormed off and locked her door. HELP ME so she understands my way. Mandy won't have the abortion because of "religous' reasons so i'm not going to worry about it i don't want it it was just a one night stand with a groupie after a shwo. and if i stick around thats affecting 4 other people because my band cant go on tour and they've already dropped out of school. My not 18 and all the stuff i've read says that my parents will pay child support and they both have really awesome jobs and make lots of money so it wont hurt that they have to pay it for a few years until it doesnt' matter that i have to pay a cuple hundred bucks a month when my band has a cd and going on bigger tours. my sister and are tight i want her to get why i'm doing this.