how would you deal?

My boyfriend works 3rd shift. 8 sometimes 10 hour nights for him. during the day he coaches football at a high school in a town 30 minutes away. (his brother who is in 10th grade attends school there and is also on the varsity team, although my boyfriend coaches the JV team) he leaves our house around 3:30 and doesn't get home until like 8:30 to then turn around at 9:30 and leave for work. well at 4:15 his mother calls me. now I'm in the middle of feeding and caring for my fussy 2 month old daughter and two dogs...home alone by myself....needless to say, I didn't answer because I was busy. An hour goes by and I am finally able to listen to the voice-mail only to find that it's 47 seconds of her yelling and bitching because I didn't answer my phone and she doesn't know if her son needs a ride to football practice or where he is and how "real fucking cool of us" it is that none of us (me who is busy with my daughter and other home responsobilities, my boyfriend who is busy coaching, and her other son who should have already been at his football practice by the time she is calling me) answered our phones when she called. I'm so annoyed at this point and don't plan on calling her back. because first I don't see how it's my responsibility or why she would even think in the first place that I would know where her 15 year old son is at let alone how he's getting to his football practice. secondly I don't feel I was deserving of such a rude voice-mail. and thirdly how do you not realize that maybe I didn't answer because I'm busy. as a mother of 4 kids of her own she should very well know that you get busy taking care of babies. 😠😠😠 sorry rant over. just really caught me off guard and definitely put me in a bad mood.