Pregnant Jessica Simp­son is living the Zen life – and it’s making her fiancé crazy!

The buxom blonde reality star has become so obsessed with yoga and meditation that she has little time for anything else, includ­ing her husband-to-be, former NFL player Eric Johnson, sources tell The ENQUIRER.

“ERIC SAYS HE CAN’T get a word of sense out of Jessica these days because she’s so con­sumed by yoga,” an insider divulged. “She shuts herself away for hours at a time, sitting cross-legged and chanting. He’s happy she’s be­ing healthy, but for Eric this is way too extreme.”

Jessica, due to deliver her second child in early August, discovered the joys of yoga while touring Asia for her “Price of Beauty” reality show three years ago.

“This experience with baby number two has been way healthi­er than the first, and she’s convinced it’s because she’s prop­erly centered through meditating,” said the source. “For the first time in her life, she feels fully in control.”

But from Eric’s point of view, Jessica seems to have lost control over the an­cient discipline. The 32-year-old “Fashion Star” mentor – and mom of 1-year-old daughter Maxwell – is so captivated with yoga, she goes to ses­sions four times a week and is even tell­ing pals she may write a book.

“When she’s not meditating, she’s reading a book about yoga or on the phone with friends talking about meditation,” added the source. “Eric likes yoga too, but he miss­es going out with her.

“He’s a patient guy, but he wants his fiancée back.”