Can’t remember title. YA book from late 1970s or early 1980s. Wren and her sister Francesca meet a girl named Anna Ferris. Anna is a budding singer. Anna has a brother, Travis (I think). Anna meets Tony and gets pregnant. Wren desperately tries to find a place to send Anna over the summer for the pregnancy so that Anna doesn’t lose her future. Wren’s mom is dating someone named Mr. Montcrief. Help! I can’t think of the title, I’ve searched the internet and nothing! Sycamore Year by Mildred Lee identified by Lost Classics reader Susan.