Erin Foster couldn’t help but tease her father,David Foster, about his engagement to singerKatharine McPhee.
The 35-year-old comedy writer and Barely Famous star left a comment on her dad’s Instagram post on Tuesday, calling McPhee, 34, “Mommmyyy” (alongside a sea of heart emoji, natch).
David’s other daughter Sara, 37, also got in on the laughs, writing, “Out of the country. What did I miss?”

It’s not the first time Erin has poked fun at David and McPhee’s coupling.
Back in September, as rumors of their romance popped up, Erin shared a photo of the two to her Instagram Stories alongside the captions, “Excited about my new step mom,” and “My parents.”
“They can’t even perform together without people saying they’re headed down the aisle,” the source said. “Erin was messing with people who jump to conclusions.”
Katharine McPhee.


But Erin herself wasn’t denying it. A month later, in October,she opened up about her dad’s then-girlfriend on the red carpet of the BLEUSALT Launch Celebration in Malibu.
“She’s amazing,” Erin told PEOPLE of McPhee. “I really like her. She’s awesome.”
She continued, “My dad is kind of a hopeless romantic, and Katharine’s awesome. We really, really like her, and we’ve known her for a really long time. And if he’s happy, we’re happy.”
Charley Gallay/Getty

David and McPhee first sparked romance rumors in May 2017 when the two were spotted enjoying a PDA-filled dinner date at Nobu in Malibu. The pair was also said to have traveled together (with McPhee’s mom) not soon after on a Vancouver getaway.
Before finding romance, the two had a long friendship, with David first meeting theAmerican Idolalum on the set of the hit reality singing competition when she was a contestant in 2006.
McPhee previously collaborated with the Grammy-winning producer for a few live performances, including his 2008 PBS tribute concertHit Man: David Foster & Friends.
They eventually went public with their romance whenthey stepped out together at the 2018 Met Gala.
Katharine McPhee and David Foster.Kevin Mazur/Getty

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Both have been married previously. His past wives include B.J. Cook, Rebecca Dyer,Linda ThompsonandYolanda Hadid— fromwhom his divorce was finalized in 2017.
source: people.com