The country crooner snapped at reporters when asked about her new love this week.
Landing in McLoughlin's native New York City, Lambert, 35, wore a baseball cap and clutched a pillow as she urged the press to leave them be.
She added, "Like 'the world should mind their own f—king business.'"
The couple had just touched down from an early morning flight from Nashville, Tenn., where Lambert has an estate.
McLoughlin, 27, didn't speak to the press and kept a low profile, wearing a black hoodie and a black baseball cap emblazoned with the Blue Lives Matter logo.
Lambert and McLoughlin reportedly met in November 2018 and tied the knot in late January.
“In honor of Valentine’s Day I wanted to share some news,” Lambert gushed earlier this month. “I met the love of my life. And we got hitched! My heart is full. Thank you Brendan Mcloughlin for loving me for.... me. #theone.”