One week after Beyoncé announced that she and hubby Jay Z are expecting twins, Life & Style has learned that the pair's new additions pretty much saved their marriage.

The duo, who was on the verge of breaking up multiple times over the past few years, decided to fight for their family after a particularly rough patch. "They both wanted two children, and made that decision when they got married," a source tells Life & Style. But their struggles to conceive after the birth of daughter Blue Ivy, 5, caused problems for the power couple.

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"Everyone working with them felt like you could cut the tension with a knife," the source shares, but "the pregnancy has renewed their relationship."

The source adds that Beyoncé is five months pregnant and that the babies were conceived via in vitro fertilization. "They've only felt comfortable announcing it because she's so far along, and they've gone through all the genetic testing and everything is great," the source reveals. Plus, they already know that they're having at least one son.

"Jay has wanted a boy since their daughter was born," the source admits. "Their wish is coming true."

But don't expect Bey to go soft on her husband of nearly nine years now that she's becoming a mother-of-three. "Beyoncé has made Jay vow that family, fidelity, and unity are going to be his top priorities from this day forward," a different insider tells Life & Style.

The "Formation" singer broke Instagram records on Feb. 1 when she revealed her pregnancy with a bump pic. In the post, which has raked up over 10 million likes, the 35-year-old wrote, "We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes."

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For more on Beyoncé and Jay Z, pick up the latest issue of Life & Style, on newsstands now! And scroll through the gallery below for a look at the best pregnancy memes to follow the duo’s announcement.