The US reality TV couple began flirting after Heidi consumed a few beers and announced she wanted to "get naughty" because it had "been too long". The twosome then slipped into bed, with Heidi asking Spencer "How deep?" before he answered:
"Deep, I want another one. No, not that one, a good one."
So we take a look back at other flirtatious celebrities and contestants who've got amorous in the Big Brother house - from Michelle and Stuart's mysterious fumbling under the table to Makosi working her magic in the hot tub with Anthony...
Copyright: Rex Features