Miranda Lambert Gives Married Boyfriend Ultimatum — Choose Wife Or National Tour!

Miranda Lambert has given her married boyfriend an ultimatum of choosing between her or his wife, RadarOnline.com has exclusively learned.

A source close to Lambert's singing boyfriend, Evan Felker, and his wife, Staci Nelson, told RadarOnline.com that after Lambert learned Felker had repeatedly called up his wife behind her back, the country singer threatened to boot him off the tour they're currently on together!

"Evan cannot be with Staci or Miranda will kick him off the tour," the source told RadarOnline.com.

Felker and his band, The Turnpike Troubadours, are scheduled to open shows for Lambert in upcoming weeks in New York, Massachusetts and Florida.

Ultimately, the source said Felker decided to stick by his famous girlfriend's side. That didn't stop Nelson, however, from calling Felker out on Instagram! The scorned wife claimed her husband called her 22 times before ghosting her when she ended up in the hospital last week.

As RadarOnline.com readers know, Nelson filed for divorce earlier this year when she learned of Felker and Lambert's roadside affair. In June, Felker convinced a judge to seal the couple's messy divorce case.

The insider told RadarOnline.com that the divorce is currently at a standstill.

"The ball is in Evan's court," the insider explained. "Staci believes there is nothing more she can do to move the process."

The source added that Felker's procrastination could mean he plans on returning to his wife after he finishes touring with Lambert.