Pregnant again, how to tell our families?

I graduated highschool in may 2006, and found out two weeks later I was pregnant. The father and I have been together for over 2 years now, and our beautiful daughter is 14 months old. Recently, since about december I have been having baby fever. The feeling of wanting another child. Three weeks ago, we found out I was pregnant. My fiancee, daughter and I have been living on our own since before I graduated, but just recently moved back in with my mother to save up money to purchase a home. Our credit will be good enough to get at least a town home before the baby is due. However, my mom has these glorious ideas that I should start going to cosmotology school full-time (which I intend to do), and just continue to live with her until I graduate. My fiancee’s family is in a different awkward situation, one of his older sisters finally got pregnant this year (after several miscarrages and years of trying), and I dont want to steal the light from her. Or be looked down on because as my soon-to-be mother in law put it when discussing the sisters pregnancy, “you were single and knocked up, she’s married and pregnant”. we intend on marrying on july 4, 2009 and have been planning this before the pregnancy news. My delima is, how do I break all this news to everyone? When I told them I was pregnant the first time I got the whole “abortion” talk, and quiet frankly I am so happy to be pregnant again, that I dont want them to destroy my mood the way they did the first time… What should I do… Any advice?