Listen Up, David Foster: Katharine McPhee Is Already Thinking Up Grandma Nicknames

The couple got engaged over the summer and now the singer is plotting out what's next for her and the RHOBH ex.

These days, Katharine McPhee definitely has her future on her mind. After the singer and former American Idol got engaged to super producer and one-time The Real Housewives of Beverly Hills hubby, David Foster, this summer, it looks like she's prepping for what's next. And, yes, that means kids ... and, well, grandkids, as she noted (with a wink) on Twitter this week: "My biggest realization of the week is that i’m going to have the grandkids call me Nanny McPhee." LOL, KAT.

(By the way, she won't have to wait long to try that moniker on for size as her future hubby/Yolanda Hadid's ex already has seven grandkids.)

Plus, should they have some kids (and eventual grandbabies) of their own, Katharine has the full support of several of David's adult children already. Sara Foster, Erin Foster, and Amy Foster have all given Katharine their thumbs up since the summer engagement, in one form or another.

In fact, Amy, 45, spoke up again recently about her future stepmom, 34 — once again co-signing her 68-year-old dad's fiancee. "No one else needs to judge this relationship. I am amazed at why people believe that they have the right to judge, not just my dad’s relationship, but anyone else’s relationship… You don’t need to judge what you don’t understand. You’re not in it, you’re not living it. Specifically I was speaking to all of the really disgusting comments that I was seeing that were labeling her as some kind of gold digger. I was like, 'Are you serious?' She’s so successful in her own right. She could have anyone," she told PEOPLE, adding that "we are all 100 percent supportive of his relationship with Kat."

Check out some vintage David Foster, below.

The Real Housewives of Beverly Hills
The Ladies Didn't Get the Memo
David Foster plays the piano but Yolanda is annoyed that Taylor is causing a scene.
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The Real Housewives of Beverly HillsYolanda Hadid David Foster Katharine McPhee

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