Jeff Bezos' fiancee Lauren Sanchez flaunts her VERY toned abs in a

The mom-of-two, 53, shared a clip to her Instagram Stories as she worked up a sweat in the gym with a handful of others - including her husband-to-be.

Jennifer Lopez Shows Off Abs After Jennifer Garner Flaunts Toned Tummy

RHOCH's Tanya Bardsley proudly reveals the results of 21 day body overhaul with jaw-dropping snaps

Jeff Bezos: Lauren Sanchez shares raw footage of her gruelling gym routine

How Sweet! Jeff Bezos Celebrates Girlfriend's Birthday With Surprise Dinner

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Lauren Sánchez wears Alo Yoga set on trip with fiancé Jeff Bezos