Katharine McPhee is suiting up to support her stepdaughter’s latest project.
The “Smash” star snapped an Instagram Stories selfie in a pastel swimsuit from Sara Foster’s new collection for Summersalt on Thursday — just one month after giving birth to her son, Rennie, with husband David Foster.
“Best one piece I’ve ever tried,” McPhee, 37, wrote. “Usually it’s cut too low and the torso isn’t long enough – straps are adjustable. So comfortable you nail it @SaraFoster.”
Foster, 40, reposted the photo on her own Stories, adding, “Had a baby a month ago. Wtf!”
Earlier this week, McPhee showed off her postpartum physique in a high-waisted brown bikini, writing, “Loving my curves because my baby gave them to me.”
In addition to the Perfect High Leg One Piece ($125), Foster also sent her stepmother the matching Men’s Swim Short ($80) and Boy’s Swim Short ($45) from her family-friendly line.
Katharine McPhee shows off the tiny swimsuit her stepdaugher, Sara Foster, gifted her newborn son, Rennie.Instagram
“I’m obsessed,” McPhee declared while showing off her gifts. “These matching bathing suits for the whole family — I’m crazy about it. Thank you so much for sending it, because I was really hoping I’d get something!”
“Do we think @DavidFoster is gonna wear the trunks?” Foster joked, reposting the clip. “Baby boy trunks for Rennie. The cutest,” she added of the pint-sized pair of shorts.
Sara and her sister Erin, 38, recently launched their own fashion line, fittingly dubbed Favorite Daughter; they’ve also collaborated on a collection for Joe’s.
“Our biggest issue with [Katharine] is how hot she is,” Erin joked in an interview last year. “Her body is insane. When she comes over for family Sundays, I’m like, ‘Do not get in a bikini.’”
McPhee and Foster, 71, got married in June 2019, making the “American Idol” alum stepmom to his five daughters, including Jordan, 34, Amy, 47, and Allison, 50, in addition to Sara and Erin.
Katharine McPhee attends the 2019 Olivier Awards.WireImage