{"id":2483870,"date":"2026-07-01T18:31:49","date_gmt":"2026-07-01T18:31:49","guid":{"rendered":"https:\/\/celebrity.land\/en\/?p=2483870"},"modified":"2026-07-01T18:31:49","modified_gmt":"2026-07-01T18:31:49","slug":"erin-and-sara-fosters-quotes-about-stepmom-katharine-mcphee","status":"publish","type":"post","link":"https:\/\/celebrity.land\/en\/erin-and-sara-fosters-quotes-about-stepmom-katharine-mcphee\/","title":{"rendered":"Erin and Sara Foster’s Quotes About Stepmom Katharine McPhee"},"content":{"rendered":"

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Katharine McPhee<\/strong><\/a> may be younger than her stepdaughters Erin Foster<\/strong><\/a> and Sara Foster<\/strong><\/a>, but they still have a close bond.<\/p>\n

The American Idol<\/em><\/a> alum started dating David Foster<\/strong> <\/a>in 2017, and the pair got engaged one year later. In June 2019, they tied the knot in London. News broke in October 2020 that McPhee was pregnant, and baby boy Rennie arrived in February 2021.<\/p>\n

Throughout their relationship, David and McPhee have gotten backlash<\/a> for their 35-year age gap. However, his kids are not pressed.<\/p>\n

\u201cEveryone has an opinion about something,\u201d Sara said during a June 2026 appearance on Kristin Cavallari<\/strong>\u2019s \u201cLet\u2019s Be Honest\u201d podcast. \u201cThey\u2019re 12 years in, and they are happy. \u2026 She\u2019s a fully consenting lady, this is not, like, some child bride. She is in her 40s.\u201d<\/p>\n

David is the father of six kids, including Rennie. His eldest daughter, Allison, was put up for adoption following her birth and reconnected with her father in adulthood. He shares daughter Amy with ex-wife B.J. Cook<\/strong> and three kids \u2014 Sara, Erin and Jordan \u2014 with ex-wife Rebecca Dyer<\/strong>.<\/p>\n

Keep scrolling to see what Erin and Sara have said about McPhee:<\/p>\n

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\n Related: <\/span>David Foster’s Family Guide: Meet the Musician\u2019s Children, Stepchildren<\/span><\/a>
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\n\t\t\tDavid Foster\u2018s family tree never seems to stop growing. The award-winning musician has been married five times in his life, which means he has a plethora of children, stepchildren, exes and, of course, his current wife, Katharine McPhee. In total, David has six biological children of his own: daughters Allison Jones Foster, Amy Skylark Foster, [\u2026]\t\t<\/p>\n<\/div>\n

July 2018<\/h2>\n

Following her dad\u2019s proposal, Sara called McPhee \u201cMommmyyy\u201d via Instagram.<\/p>\n

September 2018<\/h2>\n

The siblings joked exclusively to Us<\/em> that they \u201chope[d]\u201d they\u2019d get invites to their dad\u2019s nuptials.<\/p>\n

David \u201cnever looked better\u201d while dating McPhee<\/a>, Sara exclusively told Us<\/em>. \u201cHe\u2019s so happy,\u201d she explained. \u201cHe doesn\u2019t age. I said to him the other day, I\u2019m like, \u2018Are you on HGH? What is happening?\u2019 He just looks so young.\u201d Erin joked at the time that his \u201cyoung fianc\u00e9e\u201d should take full credit.<\/p>\n

February 2019<\/h2>\n

Sara called her future stepmom \u201creally funny,\u201d exclusively telling Us<\/em>, \u201cKatharine holds her tongue a lot. If I were her, I would be taking down trolls all day. I wouldn\u2019t be able to star on Broadway because I\u2019d be too busy taking down trolls.\u201d<\/p>\n

Amid rumors of McPhee and David spending millions on their wedding, Erin joked via Instagram: \u201cThere goes my inheritance.\u201d<\/a><\/p>\n

May 2019<\/h2>\n

\u201cWe love our future stepmom<\/a>,\u201d Sara exclusively told Us<\/em>. \u201cOur dad\u2019s very happy and we\u2019re excited.\u201d<\/p>\n

August 2019<\/h2>\n

The sisters said during an event that they \u201cfully expect [McPhee] to have a child<\/a> and fully support it.\u201d (McPhee welcomed son Rennie with David in February 2021.)<\/p>\n

September 2019<\/h2>\n

\u201cThe truth is we really genuinely love Katharine<\/a>,\u201d Erin exclusively told Us<\/em>. \u201cIt takes a very strong, graceful person to come into a family as the fifth wife and have adult daughters who are older than her and do it in a way that really creates inclusion with the family, and she just does it effortlessly. She just makes it really easy for all of us to get along. So we\u2019re very grateful for her.\u201d<\/p>\n

October 2019<\/h2>\n

Sara clarified exclusively to Us<\/em> that McPhee wasn\u2019t pregnant yet<\/a>, saying, \u201cOf course she wants a baby. I\u2019m sure they\u2019ll have a baby.\u201d<\/p>\n

November 2019<\/h2>\n

She called her dad and McPhee the \u201cperfect couple\u201d at an event, exclusively telling<\/a> Us Weekly<\/em>, \u201cI don\u2019t think they\u2019ve ever had a fight. I watch them, I\u2019m just like, they figured it out. It\u2019s beautiful.\u201d<\/p>\n

April 2021<\/h2>\n

\u201cYou ever side-planked with your 37-year-old stepmom?\u201d Erin wrote on her Instagram Story. \u201cI have.\u201d<\/p>\n

May 2021<\/h2>\n

\u201cHappy first mama\u2019s day to Rennie\u2019s mom,\u201d Sara captioned an Instagram Story shot.<\/p>\n

July 2021<\/h2>\n

Erin compared her and Katharine\u2019s July 2021 workout with Amanda Kloots to \u201cdeath.\u201d<\/p>\n

December 2021<\/h2>\n

\u201cIf I can accept my stepmom looking like this, you certainly should be able to,\u201d Erin commented on an Instagram upload showing McPhee\u2019s post-baby bikini body<\/a>. \u201cThe photo [my dad posted of her] wasn\u2019t altered or filtered, and she\u2019s had no surgery. You can\u2019t shame someone for feeling cute after a baby whether she\u2019s sharing stretch marks or a six pack. Let her live.\u201d<\/p>\n

July 2022<\/h2>\n

Erin trolled her stepmom via Instagram after she posted a PDA-filled snap with David. \u201cPoor guy \u2026 too bad he doesn\u2019t get very much attention,\u201d McPhee captioned the sexy snaps, to which Erin replied, \u201cReporting this.\u201d<\/p>\n

December 2022<\/h2>\n

Erin showed the \u201cMy Grown-Up Christmas List\u201d singer support \u2014 and praised her saucy style \u2014 after seeing McPhee\u2019s green Vegas gown. \u201cOkkkkkkkk \ud83d\udd25,\u201d the TV writer commented via Instagram.<\/p>\n

February 2023<\/h2>\n

After McPhee shared a series of throwback photos of her life with David via social media, Erin was quick to respond. \u201cIt was always you. Happy \ud83d\udc95 day,\u201d the Smash alum captioned the Valentine\u2019s Day post, to which Erin wrote, \u201c\ud83d\ude2d\ud83d\ude2d\u2764\ufe0f\u2764\ufe0f.\u201d<\/p>\n

June 2026<\/h2>\n

Sara slammed critics of David and McPhee\u2019s age gap, praising her \u201camazing\u201d stepmom.<\/p>\n

\u201cI think it\u2019s hard being a stepparent, obviously. I think you want to ride the line of wanting your partner\u2019s kids to like you and wanting to show up as a motherly figure,\u201d Sara said. \u201cBut you also have to have respect for the real mom \u2026 the biological mom.\u201d<\/p>\n

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