“Are you sure you should do this again?” Gina asked me over lunch a couple of weeks later. Lia and I had gotten together nearly every night during those two weeks and it was like it used to be. Fantastic sex at night, friendly acquaintances during the day. “Why not?” I took a bite of my burger. “I just thought you . . . I don’t know.” Gina shook her head, then pushed her brown hair back behind her ears. “I don’t know eith...