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Katharine McPhee Hilariously Wants To Ship David Foster's Children 'Off To Switzerland'
![David foster pp](https://media.okmagazine.com/brand-img/pBRJe17yM/480x251/2018/08/david-foster-pp.jpg 480w, https://media.okmagazine.com/brand-img/pBRJe17yM/640x335/2018/08/david-foster-pp.jpg 640w, https://media.okmagazine.com/brand-img/pBRJe17yM/768x402/2018/08/david-foster-pp.jpg 768w, https://media.okmagazine.com/brand-img/pBRJe17yM/1024x536/2018/08/david-foster-pp.jpg 1024w, https://media.okmagazine.com/brand-img/pBRJe17yM/1280x670/2018/08/david-foster-pp.jpg 1280w, https://media.okmagazine.com/brand-img/pBRJe17yM/1440x753/2018/08/david-foster-pp.jpg 1440w, https://media.okmagazine.com/brand-img/pBRJe17yM/1600x837/2018/08/david-foster-pp.jpg 1600w, https://media.okmagazine.com/brand-img/pBRJe17yM/2160x1130/2018/08/david-foster-pp.jpg 2160w)
Aug. 31 2018, Updated 10:54 p.m. ET
Katharine McPhee is playing some games with her new almost-step-daughters Erin and Sarah Foster. The Smash star is engaged to their dad, David and it looks like the family is getting along great! They had some fun over Instagram yesterday so keep reading to hear what went down between them.
![David foster 1](https://media.okmagazine.com/brand-img/M59Ios5-x/480x307/2018/08/david-foster-1.jpg 480w, https://media.okmagazine.com/brand-img/M59Ios5-x/640x409/2018/08/david-foster-1.jpg 640w, https://media.okmagazine.com/brand-img/M59Ios5-x/768x490/2018/08/david-foster-1.jpg 768w, https://media.okmagazine.com/brand-img/M59Ios5-x/1024x653/2018/08/david-foster-1.jpg 1024w, https://media.okmagazine.com/brand-img/M59Ios5-x/1280x817/2018/08/david-foster-1.jpg 1280w, https://media.okmagazine.com/brand-img/M59Ios5-x/1440x919/2018/08/david-foster-1.jpg 1440w, https://media.okmagazine.com/brand-img/M59Ios5-x/1600x1021/2018/08/david-foster-1.jpg 1600w, https://media.okmagazine.com/brand-img/M59Ios5-x/2160x1378/2018/08/david-foster-1.jpg 2160w)
The American Idol alum shared a picture of herself on her Canadian vacation and Erin couldn't wait to comment.
![David foster 3](https://media.okmagazine.com/brand-img/MST_6qJ5i/480x307/2018/08/david-foster-3.jpg 480w, https://media.okmagazine.com/brand-img/MST_6qJ5i/640x409/2018/08/david-foster-3.jpg 640w, https://media.okmagazine.com/brand-img/MST_6qJ5i/768x490/2018/08/david-foster-3.jpg 768w, https://media.okmagazine.com/brand-img/MST_6qJ5i/1024x653/2018/08/david-foster-3.jpg 1024w, https://media.okmagazine.com/brand-img/MST_6qJ5i/1280x817/2018/08/david-foster-3.jpg 1280w, https://media.okmagazine.com/brand-img/MST_6qJ5i/1440x919/2018/08/david-foster-3.jpg 1440w, https://media.okmagazine.com/brand-img/MST_6qJ5i/1600x1021/2018/08/david-foster-3.jpg 1600w, https://media.okmagazine.com/brand-img/MST_6qJ5i/2160x1378/2018/08/david-foster-3.jpg 2160w)
Erin commented, "CHIC.” A fan followed after and asked, "How awkward is it when your dad has a younger wife than you are?" She then responded, “I’ve started saying I’m 31, so now she’s 3 years older than me. I’m a problem solver.”
![David foster 2](https://media.okmagazine.com/brand-img/yw_JPOGj7/480x307/2018/08/david-foster-2.jpg 480w, https://media.okmagazine.com/brand-img/yw_JPOGj7/640x409/2018/08/david-foster-2.jpg 640w, https://media.okmagazine.com/brand-img/yw_JPOGj7/768x490/2018/08/david-foster-2.jpg 768w, https://media.okmagazine.com/brand-img/yw_JPOGj7/1024x653/2018/08/david-foster-2.jpg 1024w, https://media.okmagazine.com/brand-img/yw_JPOGj7/1280x817/2018/08/david-foster-2.jpg 1280w, https://media.okmagazine.com/brand-img/yw_JPOGj7/1440x919/2018/08/david-foster-2.jpg 1440w, https://media.okmagazine.com/brand-img/yw_JPOGj7/1600x1021/2018/08/david-foster-2.jpg 1600w, https://media.okmagazine.com/brand-img/yw_JPOGj7/2160x1378/2018/08/david-foster-2.jpg 2160w)
Katharine interjected and wrote, “@erinfoster stop blowing my age cover! the day we say I do, I’m shipping you and your sister off to Switzerland."
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![David foster 4](https://media.okmagazine.com/brand-img/x4q61X3lU/480x307/2018/08/david-foster-4.jpg 480w, https://media.okmagazine.com/brand-img/x4q61X3lU/640x409/2018/08/david-foster-4.jpg 640w, https://media.okmagazine.com/brand-img/x4q61X3lU/768x490/2018/08/david-foster-4.jpg 768w, https://media.okmagazine.com/brand-img/x4q61X3lU/1024x653/2018/08/david-foster-4.jpg 1024w, https://media.okmagazine.com/brand-img/x4q61X3lU/1280x817/2018/08/david-foster-4.jpg 1280w, https://media.okmagazine.com/brand-img/x4q61X3lU/1440x919/2018/08/david-foster-4.jpg 1440w, https://media.okmagazine.com/brand-img/x4q61X3lU/1600x1021/2018/08/david-foster-4.jpg 1600w, https://media.okmagazine.com/brand-img/x4q61X3lU/2160x1378/2018/08/david-foster-4.jpg 2160w)
“Omg you’re gonna parent trap us!!! I knew it,” Erin said. The Foster sisters and Katharine love to joke around with each other.
![David foster 6](https://media.okmagazine.com/brand-img/MRXl10Yhk/480x307/2018/08/david-foster-6.jpg 480w, https://media.okmagazine.com/brand-img/MRXl10Yhk/640x409/2018/08/david-foster-6.jpg 640w, https://media.okmagazine.com/brand-img/MRXl10Yhk/768x490/2018/08/david-foster-6.jpg 768w, https://media.okmagazine.com/brand-img/MRXl10Yhk/1024x653/2018/08/david-foster-6.jpg 1024w, https://media.okmagazine.com/brand-img/MRXl10Yhk/1280x817/2018/08/david-foster-6.jpg 1280w, https://media.okmagazine.com/brand-img/MRXl10Yhk/1440x919/2018/08/david-foster-6.jpg 1440w, https://media.okmagazine.com/brand-img/MRXl10Yhk/1600x1021/2018/08/david-foster-6.jpg 1600w, https://media.okmagazine.com/brand-img/MRXl10Yhk/2160x1378/2018/08/david-foster-6.jpg 2160w)
Katharine even jokingly demanded more alone time with David and wanted to be away from Sarah and Erin.
![David foster 5](https://media.okmagazine.com/brand-img/bQ7hIXRnZ/480x307/2018/08/david-foster-5.jpg 480w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/640x409/2018/08/david-foster-5.jpg 640w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/768x490/2018/08/david-foster-5.jpg 768w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/1024x653/2018/08/david-foster-5.jpg 1024w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/1280x817/2018/08/david-foster-5.jpg 1280w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/1440x919/2018/08/david-foster-5.jpg 1440w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/1600x1021/2018/08/david-foster-5.jpg 1600w, https://media.okmagazine.com/brand-img/bQ7hIXRnZ/2160x1378/2018/08/david-foster-5.jpg 2160w)
What do you think of Katharine's relationship with her new soon-to-be step-daughters? Sound off in the comments below!