They’re identical twins who married best friends, teach at the same school, call each other every night to wish each other “doubly pleasant dreams” and have a set of identical twins of their own.
Now, for the second time, Kerri Bunker and Kelli Wall of Lindon, Utah, are each expecting twins, due – you guessed it – two weeks apart in March.
“We’re proof that good things come in twos,” says Kerri, 36, who already has 4-year-old twins, Hallie and Kole (she also has a daughter, Sadie, 2), while Kelli is the mom of Madison and McKell, also 4. “For this to happen once was amazing enough. But twice?”
The sisters, who both have fertility issues, became pregnant with their first sets of twins through in vitro fertilization, 11 months apart.
In June, on the day Kelli learned she was pregnant again with twins through in vitro, Kerri says she kept thinking, “Wouldn’t it be funny if I found out that I was again pregnant with twins, too?”
On a whim, she took a home pregnancy test.
“When it turned up positive, I was floored,” she tells PEOPLE, “especially because I’d been told I would need treatments again to conceive. I called my husband and the rest of the family with the news and nobody would believe me. Everybody thought I was joking.”
It wouldn’t have been the first time the sisters had pulled one over on everyone.
“In junior high, we switched classes on April Fool’s Day and I took a language arts test for Kerri and got 100 percent,” recalls Kelli. “And people have never been able to tell our voices apart, even our parents. We’ve always fit the identical twin profile to a T.”
Because they are best friends who had never spent a day apart – even in college where they were roommates majoring in elementary education – it was difficult when Kelli got married first, to Dustin Wall, a 29-year-old diesel mechanic.
“She cried and cried after I left,” Kelli tells PEOPLE. “It was the hardest thing we’d been through.”
Kelli and her new husband soon found a way around the dilemma, though, by introducing Kerri to Dustin’s best friend, Robert Bunker, a special education teacher.
“We’re all so close that people say we’re in a love square, not a love triangle,” says Kerri, who is now planning to build a house with Dustin next door to her sister’s place. “Even though Kelli and I work together, we still call each other at 9:45 every night to say good night.”
“From the first moment I met Kelli, I was amazed me how close she and her sister were and still are,” Dustin, 29, tells PEOPLE. “Many times, they end up wearing the same clothes even though they don’t plan on it. And they’re always finishing each other’s sentences and know intuitively when something is amiss with the other one. They’ll always be a major part of each other’s lives.”
At Timpanogos Academy in Lindon, where Kerri teaches third grade and Kelli teaches fifth, new students often wonder, “‘How did she get from one end of the hall to the other so fast?'” says Kelli. “And then when they realize there are two of us, they still mix us up.”
“They really think alike and are twins in every sense of the world,” school principal Errol Porter tells PEOPLE.
And now that the sisters are each pregnant with twins again, “the children they’re bringing into this world are very lucky to have them as their mothers,” he says. “It’s an honor to know them and work with them.”
With Kelli’s due date on March 10 and Kerri’s on March 24, “There’s a chance we might end up in the hospital on the same day,” Kelli tells PEOPLE.
She pauses and laughs.
“But after nine months of pregnancy, it’s a safe bet to say that I won’t be looking to match Kerri’s due date.”