This Argentine couple has now become a throuple after they invited a teenage girl to join their relationship – and she accepted.

Eliana Cuchietti and Nazareno Fernandez started out as a couple like any other in the Argentine city of Mendoza, where they managed a call centre together.

Maira Fernandez was just 18 when she joined the company and the three quickly hit it off, becoming friends and often socialising outside work hours.

Maira, now aged 23, told Diario Los Andes: “We started seeing that we felt things we didn’t understand. The three of us got together without problems, but if I got together just with Eli, we would miss the other one. Something was going on.

“If there were just two of us, whatever we did, we would miss the other person. This led to the question of how we would continue. We have a polyamorous relationship of three. We’re not in an open relationship, we’re not swingers. We’re a throuple and we love each other.”

Though neither Eliana nor Maira had previously had a same-sex relationship, it was the women who made the first move.

Eliana said: “We had organised a get-together at our house and we decided not to go out dancing. We were having a meal after spending the whole day together.

“At one point, Mai and I decided to play a prank on Naza, and we told him we were going to be girlfriends because we no longer liked men.

“We had dinner, I offered him wine. He said no and she said yes. Then we kissed. It all became clear.”

Nazareno said: “As a man, it’s a normal fantasy, I was in the middle of two beautiful women, but I didn’t believe that I was about to form part of a three-way relationship.

“Everything was natural and problem-free from the outset. What we were feeling happened: the three of us loved each other, we protected each other.

“It was what the relationship was missing because we had previously noted that just the two of us felt incomplete.”

Months after the three-way relationship was born, Maira moved in with Eliana and Nazareno – who has three daughters, each from different relationships – and they bought a bigger bed.

Nazareno’s father accepted his son’s new three-way relationship straight away, as did Eliana’s parents, even though she initially found it difficult to tell them.

With Maira, it was a different story – she initially told her dad she was in a relationship with Nazareno, now 41, which was difficult for him to accept because she was just 19 when she told him.

He eventually accepted their relationship, and she and her mother – who already knew – then told him about Eliana.

She said: “He went through a process and he now asks me about them more than about me.”

The three will shortly be celebrating their fifth anniversary and they would like to get married, even though polygamy is not legal in Argentina.

Nazareno added: “We would like to be parents…but it’s still too early.”