Pregnant, how to break the news to mom...?

She is a pot smoker, has chokedme out recently, dont live with her thou, she choked me cause i wouldnt look at her while she was talking to me, but anyway.... both her and step dad are abusive mom smokes step dad "steve" pops pills drinks on a daily basies has been in treatment, child protection has been called to our house. real dad is 110 percent supportive. wants me to move to florida with him and is allowing my boyfriend to also... what to do what to do....? oh and any ideas for names:) just playing, trying to keep the mood light dad said i cant stress or i could lose him/her... didnt plan this one partner, entire life, birthcontrol failed.