Miranda Lambert’s Married Boyfriend Goes Behind Her Back & Calls His Wife!

Miranda Lambert is not happy with her new boyfriend!

A source exclusively told RadarOnline.com the "Vice" singer was "furious" on Wednesday when she learned her married boyfriend, Evan Felker, went against her orders and called up his estranged wife, Staci Nelson.

The phone call occurred two months after Felker, also a singer, ghosted Nelson to be with Lambert. The source revealed Felker did not phone up his wife to get back with her, however.

"He was trying to be nice and move the divorce along," the source said about the call.

As RadarOnline.com readers know, Lambert gave Felker an ultimatum after the new couple's affair became public. She informed Felker he could not have any communication with Nelson, who was blindsided by news of the tryst.

Nelson apparently didn't seem too pleased by the phone call. On the same day, the heartbroken wife posted a cryptic Instagram of a wine bottle with the initials E and S separated by two swords and two hearts.

Last month, Felker filed a motion to end his marriage as soon as possible, RadarOnline.com reported.

The insider added that Felker was left "pissed" by the phone call.

"She just wants a break from Evan and Miranda," the source continued.