Substitute Sister (Full House: Sisters)

Substitute Sister (Full House: Sisters) by West, Cathy. paperback edition. ISBN: 9780671040895.

When sisters get together... expect the unexpected Michelle is teamed up with Stephanies best friend Allie, and Stephanie is matched with new girl Cynthia in the "Big Pal, Little Pal" program at school. Stephanie wants to make Cynthia feel right at home. And what better way to do so than to devote all her free time to hanging out with her little pal? Michelle is psyched for the school program, too. Now Allie, Stephanie, Cynthia and Michelle can all hang out together! But when Stephanie and Cynthia start spending all their time together -- just the two of them -- Michelle starts to get worried. Especially after Michelle and Stephanie get into a big fight and end up not speaking to one another! Is Stephanie going to dump her for a substitute sister?