A NEW mattress can prove your partner is cheating by detecting how many people are in bed and what activity is going on.

It then informs the owner via a mobile phone app.

The ‘Smartress’ was designed by Spanish mattress maker Durmet after figures revealed that Spaniards are the most unfaithful people in Europe.

The hi-tech bed features a Lover Detection System with 24 ultrasonic sensors that create a 3D map of the mattress to show where there is greater pressure and what movement is taking place in real time.

Durmet spokesman Jose Antonio Muinos said: “We came up with the idea after we saw the figures on infidelity that said Spaniards were the most unfaithful in Europe.

“It is a concept that will bring peace of mind to men and women, not just during the night but also during the day while they are out at work and when the bed should not really be being used.

“On the outside it is just a normal looking and very comfortable mattress, but inside hides some cutting-edge technology.

“We think the mattress will do well internationally because it is the only one in the world that uses this technology and is designed specifically for the objective of catching cheating partners.”

Customers can buy the mattress from the website with ‘utmost confidentiality’.

People who live in Madrid were revealed as the most promiscuous with the highest number of affairs taking place in the area, according to extramarital affairs site Ashley Madison.

This article originally appeared on The Sun.