The model and Scott Mason were clearly impressed by their visitors, who were part of a party prize won by Scott for completing his secret Final Act mission.
Ashleigh Hughes, Deana Uppal and Luke Scrase were banned from the party and spending time with the butlers for talking about nominations.
An annoyed Ashleigh said: "This has f**king pissed me off right now!"
An embarrassed Scott said: "I can't look, I'm so embarrassed!"
Commenting on the butlers from the garden, Ashleigh said: "He's very stiff that one... they are all in good shape."
Sara then asked one of the butlers if they had a girlfriend, while flirting with him.
Scott, Ashleigh, Deana and Adam are the four housemates facing the public vote and possible eviction this week.
Big Brother continues daily on Channel 5.
The series finale airs on Monday, August 13 at 9pm.