I'm looking for a short novel that I read in elementry school. It centered around two sisters and their family who had just moved into the countryside. The older sister, who's name may or maynot be Molly (can't remember but it sounds right) had some type of nondisclosed illness (though we are led to believe that it is cancer). She wakes up at night with nose bleeds and other mysterious ailments. Their mother is making a quilt with the older sisters first bra in it. The younger sister meet a neighbor who is a photographer with a dark room. The older sister dies.