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David Foster’s Daughter Calls Katharine McPhee Her ‘New Step Mom’ In Bizarre Pics
![david foster daughter calls katharine mcphee step mom pics long](https://media.okmagazine.com/brand-img/jLV05Lh5V/480x251/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 480w, https://media.okmagazine.com/brand-img/jLV05Lh5V/640x335/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 640w, https://media.okmagazine.com/brand-img/jLV05Lh5V/768x402/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 768w, https://media.okmagazine.com/brand-img/jLV05Lh5V/1024x536/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 1024w, https://media.okmagazine.com/brand-img/jLV05Lh5V/1280x670/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 1280w, https://media.okmagazine.com/brand-img/jLV05Lh5V/1440x753/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 1440w, https://media.okmagazine.com/brand-img/jLV05Lh5V/1600x837/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 1600w, https://media.okmagazine.com/brand-img/jLV05Lh5V/2160x1130/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-long.jpg 2160w)
Sept. 21 2017, Updated 7:23 p.m. ET
Erin Foster is either really excited about her dad David Foster’s new girlfriend Katharine McPhee or totally trolling the record producer. Erin, 35, took to her Instagram story to post a series of photos of Katharine, 33, and her dad, 67, attending the Grammy Museum Gala this week, where David received the Architects of Sound Award. In the pics, Erin called Katharine her “new step mom” and captioned a pic of David and Katharine, “my parents.” While Erin could be hinting that Katharine and her dad are getting serious, she might also be pointing out that a woman two years younger than she is could potentially be her new mom (and she might not be happy about it)! Click through to see Erin’s pics and decide for yourself!
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Erin shared this snap of Katharine and David talking seriously over dinner. “Excited about my new step mom,” Erin captioned the pic.
![david foster daughter calls katharine mcphee step mom pics 07](https://media.okmagazine.com/brand-img/0euJ0Quht/0x0/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-07.jpg)
Erin then posted this pic of David and Katharine performing a duet on stage. “My parents,” she wrote, including an emoji of a family of three.
![david foster daughter calls katharine mcphee step mom pics 03](https://media.okmagazine.com/brand-img/hGqmH2GSU/0x0/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-03.jpg)
While Katharine and David have yet to confirm their relationship, the two were spotting getting cozy at Nobu in Malibu in May. A source told E! News that the pair was “very intimate during their dinner” and that David even kissed Katharine’s cheek “several times.”
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“They were acting as if they were a couple,” the insider added. "By the end of the date, Katharine sat on David's side of the table and cuddled him with a blanket.”
![david foster daughter calls katharine mcphee step mom pics 04](https://media.okmagazine.com/brand-img/XEtazVBmj/0x0/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-04.jpg)
Katharine and David have known each other for over a decade. The two first met when David mentored Katharine during an episode of American Idol back in 2006.
![david foster daughter calls katharine mcphee step mom pics 05](https://media.okmagazine.com/brand-img/tgAuEVy4H/0x0/2017/09/david-fosters-daughter-calls-katharine-mcphee-step-mom-pics-05.jpg)
Do you think Erin is excited about her father’s new relationship or is she trolling her dad? Sound off in the comments below!