She planned Billie's baby shower, told all the world how excited she is about becoming an aunt and now she's jetted off with her sister for a well deserved holiday.
The pair are enjoying a sunshine break in Dubai after a rocky few months during which Sam, 23, was diagnosed with Crohn's disease and quit hit ITV show The Only Way is Essex.
It's great to see the sisters looking after each other, and Billie, 24, has even revealed Sam will be with her when she gives birth.
She said: 'My sister Sam will be in the delivery room, taking photos and video.'
The blossoming mum-to-be is due in June and she looks stunning as she shows off her growing baby bump in a sexy red bikini.
Billie admits she loves her pregnancy curves and says she still feels attractive.
She said: 'I feel sexy and confident. I'm embracing my bump and trying to stay glamorous.'
Sam, looking tanned and lean in a pretty white bikini, was spotted splashing about in the sea with Billie during their much-needed break.
Sam's weight plummeted to 7st 3lbs after she was diagnosed with Crohn's disease, a long-term bowel disorder, but Billie says her sister has now gained a few pounds and and is recovering well.
She said: 'Sam's feeling a lot more confident and has put some weight back on. She doesn't dwell on things.'
And, not surprisingly, Billie - who jointly owns Minnies clothing boutique in Brentwood with her sister - is supporting Sam any way she can.
She said: 'When she's feeling tired and drowsy I tell her to stay in and rest. Her happiness is all I care about.'
To see more exclusive pictures of Sam and Billie pick up a copy of the magazine, out now.
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