The first first appeared to kiss in bed on Friday after sleeping together.
And in the early hours of this morning the boys managed to find a camera blind spot in the Big Brother house.
Sitting beneath a mirror, the pair couldn't been seen by cameras by microphones picked up every word... and a bit more too.
"Are you looking forward to seeing how I behave outside of the house?" Christopher asked.
He joked: "I'll be avoided after this."
"At all costs," Mark quipped.
After some noisy kissing sounds, Christopher was heard to say: "The others need to go to bed."
Mark pleaded with Big Brother: "Give us more alcohol!"
The show continues tonight at 9PM on Channel 5.