My second child was eager to sleep in a “big-girl bed” in her sister’s room. Each night I tucked Britta under the covers, issuing strict instructions to stay in bed, warning her I’d return her to the crib if she didn’t. Night after night, I found her in the hallway and had to escort my discouraged darling back to her crib. Years later I learned her customarily-sweet older sister wasn’t excited about having a roommate and repeatedly told Britta that she’d heard me calling for her. Britta heeded her sister’s words, went to look for me, and thus landed herself…