Carrie Underwood ‘Thrives on Being Busy’ But It ‘Causes Tension Between’ Her and Husband Mike Fisher

Carrie Underwood enjoyed a summer of R&R with husband Mike Fisher, but her schedule is starting to fill up again and friends worry it could spell more trouble in the couple’s 15-year marriage.

“Carrie thrives on being busy,” a source tells Star. “When exciting offers come her way, she finds it incredibly hard to say no. She had a great time on her break, but things are about to pick up in a big way again.”

American Idol host Ryan Seacrest recently hinted to Entertainment Tonight that the country music superstar, 43, will be returning for season 25.

Underwood has also “got new music that she’s putting out,” adds the source. “Plus, she’s now being seriously considered to play Dolly Parton in a biopic, which would be the opportunity of her dreams.”

Fisher, 46, is “very happy” for his wife’s success, the source notes. “But everyone knows that the more she’s got on her plate, the more he’s got on his own as far as running the house and taking care of the boys.”

As Star previously reported, for the past several years, Underwood’s packed calendar has meant spending long spells on the road, away from the retired NHL star and their two children, sons Isaiah, 11, and Jacob, 7.

“He doesn’t complain, but there’s no doubt it wears on him and causes tension between the two of them,” says the source. “They’re in a good place right now, but keeping that balance once everything ramps up again is going to be the real challenge.”