Love Island fans seem sure they have just seen Hugo Hammond and Amy Day getting down and dirty under the sheets.

On Sunday's instalment of the ITV2 dating show, the split-second shot really got tongues wagging.

With the lights off, they probably thought it was safe to do whatever they pleased.

But they hadn't counted on night-vision - and they couldn't escape completely.

Hugo and Amy's positioning left many wondering exactly what was going on in the bed.

Some fans saw an exposed foot at the bottom of the duvet and say it has given the game away.

It was a quick look, but fans seem to know what they saw! (

Image:

ITV)

It may have been blink-and-you'll-miss-it stuff, but it was enough to convince many on social media that something saucy was going down.

One asked: "Can we revisit what went on with Hugo and Amy under those bed covers?"

Another said on twitter: "Amy and Hugo are having a great night!"

A third put: "Is Amy doing sex with Hugo???"

It's the least Hugo deserves after a frustrating first month in the villa.

Will there be some guilty looks over the next few days? (

Image:

ITV)

Although they appear to be getting on like a house on fire, some fans are still not convinced that their bond is genuine.

Many believe Amy may be playing a game to secure her place on the show for a bit longer.

Viewers took to Twitter again to air their thoughts on the pair.

One put: "Can’t believe that Hugo was s*****8g there. Amy really will do anything for that £50k, no chemistry whatsoever."

While another said: "Amy really used Hugo for that passport to the villa."

Night vision cameras caught something going on! (

Image:

ITV)

Last week, Love Island fans said they 'want to call Ofcom' over Hugo's awkward X-rated chat with Amy.

When he sat down with Amy, viewers couldn't get over his cringe flirting.

When asked "what she does" and "what she's into," Amy revealed she enjoys playing tennis and going to the gym.

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Attempting to turn up the heat with his lines about tennis, Hugo said: "I think I'd thrash you though."

Surprised, Amy replied: "I think you'd be surprised," before adding: "I think you need to watch out and not be so cocky."

When talk turned to his teaching career, Amy asked if he was "quite strict?"

But when he said he wasn't, she was quite disappointed, as she said: "Oh, see, you've let me down now. I wanted you to be like [whip cracking noise]."

"I'm somewhere in between," Hugo said.