Cara Delevingne and Halsey have been secretly hooking, all while their respective exes are dating, a new report claims.According to The Sun, the women have gotten closer during the Covid-19 pandemic as they've spent time together in Los Angeles."Cara has been hooking up with Halsey in the last few weeks and they've been having a laugh together," a source told the United Kingdom tabloid. "It's all very casual and just a bit of fun.