Like Sisters on the Homefront by Rita Williams-Garcia

Gayle is 14 years old, has a baby, and is now pregnant again by a different man.  Her mom takes her to get an abortion and soon after decides to send her down south to live with her uncle and his family.  Her cousin Cookie (Constance) tries to befriend her, but Gayle is not interested.  Gayle stays home and helps take care of her Great Grandmother, Great, and does whatever her Miss Auntie tells her to do along with taking care of her son, Jose. Gayle starts leading Cookie down the wrong path with a boy and Cookie fights against it to a point and then seems to give in.  Great shares with Gayle some of their history and Gayle ends up softening up and becoming a part of the family.

Great story and character development.  Would recommend for high school and up because of the abortion at the beginning and talk of sex throughout the book.