Miranda Lambert’s marriage was put to the test after her husband, Brendan McLoughlin, was caught dancing with other women at his wife’s bar in Nashville. The situation reportedly left the “Wranglers” singer “humiliated,” as a source spilled to a news publication: “Miranda gave Brendan a piece of her mind and a warning he’d better mind his behavior or else.” While Lambert hasn’t discussed the state of her marriage with the public, the insider claimed insecurities caused by McLoughlin’s shady behavior are to blame for the country star’s recent mid-concert meltdowns. In both June and July, Lamber…