If you where pregnant how would you tell your parents?

i am pregnant and my boyfriend and i are expecting a baby i am due in september and we arent sure how to tell my parents that i am pregnant and that we are getting married before the baby. I am planning on moving w him when i end this semester he is in the military and is stationed in texas i know my mom will react bad but ive tried to tell her but i just can't come to tell her she put me down with all the decisions i make. she will probably tell me she was right about me. my sister is also pregnant and she is 26 and married and she told my sister and her husband that they where ruing there life help.