The TOWIE sisters were making the most of the sunshine on Monday (19 May) by taking a dip in their pool, and Sam took a video of Billie and her growing bump.
Sam, 23, added: "Fun in the sun today me & my baby bump swimming not long now."
Scroll down to watch the super cute video!
Sam also Tweeted: "Lovely day in the sun & swimming @louise_beauty & champagne magnums of course xx"
In fact, Sam had a sun-filled weekend as she spent her Sunday shooting the new collection for her and Billie's shop, Minnie's Boutique.
Sounds like the perfect few days, to us!
Watch Sam plant a kiss on 24-year-old Billie's baby bump here..
Fancy winning one of Sam's favourite bikinis? Click here!
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