In scenes that will be aired tonight, the housemates will nominate for the first time and it seems Jason has had enough of Laura and Marco getting it on.
Making his nominations in the Diary Room, Jason tells Big Brother that he wants to pick Laura.
Explaining his reason, he says: "The getting together with Marco after a couple of days, they're two adults and they can do whatever they want...
"[But] if you're touching each other explicitly in front of people after a short time, then sometimes you've just got to draw the line."
Earlier this week, Marco and Laura's sleazy romp sparked more than 250 complaints with TV watchdog Ofcom. Big Brother declined to comment.
Sadly for Jason, it seems things are only going to get worse. Also tonight, Laura and Marco decide to get passionate in the pool before sharing a naked shower together.
We're confused. Marco does have a fiancée, doesn't he?
Big Brother continues tonight, 9pm, Channel 5