Kacey Musgraves and her estranged husband, Ruston Kelly, exchanged cryptic tweets with each other less than two months after their split.“It is what it is,” the “High Horse” singer, 31, wrote via Twitter on Monday, August 17, which promoted Kelly, 32, to respond a day later: “It doesn’t have to be.”The Twitter exchange caused some fans to think the pair, who announced their separation earlier this year, were getting back together.“IM NOT OKAY,” one user wrote.