The Goodwillie family just gained a whole new generation of cousins in one busy year.

Four sisters from England are pregnant at the same time in a strange coincidence, including two of them who are due in the same month.

Kayleigh Stewart, 29, and her sister Jay Goodwillie, 35, are both due with baby boys in May. It will be Kayleigh’s first time as a mom, and Jay’s second.

Two of their other sisters, Kerry-Anne Thomson, 41, and Amy Goodwillie, 24, are earlier along in their pregnancies, with Kerry-Anne due in October and Amy due in August.

“I’m still quite shocked,” Kayleigh told South West News Service about the siblings’ serendipity.

“There will be another four kids this year — it’s doubling.”

Kayleigh knew her sister, Jay, had been trying for a baby, but was still surprised when she told her via FaceTime – with some news of her own to share.

“I said, ‘No chance, me too,’” Kayleigh recalled of the phone call.

A few weeks later, the siblings told the rest of their family about their pregnancies, wearing matching T-shirts to make the reveal — and later shared a joint gender reveal party, too.

Following Kayleigh’s and Jay’s big news, Amy announced her pregnancy at Christmas, and Kerry-Anne completed the streak in March.

“We have always been a close family; at one point we all lived together in a house-share,” Kayleigh explained. “We would always steal each other’s clothes and makeup.”

“It is statistically really unlikely to be pregnant at the same time,” she continued. “We have quite close periods so I don’t know if that is a factor.”

Now, the four live within five minutes from each other, and joke that it will be “good for daycare.”

The girls also have two other sisters, Kim Goodwillie, 27, and Jodi Goodwillie, 21, who are not currently expecting.

Now, when the holidays roll around, their family celebrations will be packed full of 22 people, including the new babies, significant others and grandparents.