They claim they even received threatening letters to their workplaces.
Architectural and design representative, 26-year-old Maggie Odell originally from California, US, first met her partner marketing manager, Cody Coppola, 30, originally from Florida, US, on Tinder in February 2016.
In November of that same year they met 25-year-old knowledge management analyst Janie Frank and their friendship quickly blossomed into something bigger.
"We met Janie on an app. Then we met in-person at a bar. It was supposed to be very casual, none of us were looking for a relationship, it just happened," said Maggie.
"Cody jokes that Janie came over and then never left," she continued.
"But he's happy about it. It happened so organically that we were already in a relationship when we realised what was happening. It didn't really require navigating any more than any other relationship.
"It was a first time experience, but just in the way that any new relationship is a first time experience. It didn't seem more or less significant than any other first relationship I had been in.”
But while the throuple, who now live in Denver, Colorado, say they couldn’t be happier than they are together, their lives have been blighted by the actions of a mystery stalker.
The hate campaign began after they went public with their relationship on Instagram in April 2018.
Letters were all sent to Maggie, Cody and Janie respective workplaces attempting to pressure their employers into firing them.
Janie received additional letters accusing her of not being a genuine member of the LGBTQIA (lesbian, gay, bisexual, transgender, queer and/or questioning, intersex and asexual and/or allies) community.
Cody said that while they saw some of the hate-mail: ”We were never able to get copies of Maggie's letters because her job never provided them.
"We coped by checking in with each other and being there for each other in all the ways we could. It was a hard time for all of us, but we just rallied around each other and became even more vocal about our love."
"The letters said a few different things," explained Cody. "Maggie and my letters essentially said that we should be fired from our jobs because our relationship is inappropriate.
"Janie's was more personal, and said that her partners should be embarrassed, that she is a fake member of the LGBTQIA community and that she didn't actually love Maggie.
"We really don't get too many weird looks when we're out together. To people just seeing us in passing, we probably just look like three friends.
"It's not like all three of us hold hands at the same time, and we're not huge on PDA."
He continued: "When there is a time someone notices, we usually just laugh about it and joke about how confused they must be.
"We live in a very progressive city, so we're lucky that most people really don't care.
"Most often, the looks we get are when people see Janie and Maggie holding hands or something. In any case, we ignore it.”
The three had plans to relocate to Prague but the coronavirus pandemic means that the dream is temporarily on hold but once they are able to move over, they plan to explore Europe, Asia and Africa whilst making life-long memories together.
Cody says that living with two women isn’t much more difficult than living with one: "It's not that complicated. If people think about what can happen in a relationship – how happy it makes you, how fulfilled it can make you, things like that – I've basically tripled that.”
"I have three relationships – the one with Maggie, the one with Janie, and the one with the three of us.
"If what you want is love from a relationship, I have two or three times the amount of love. If what you want is support, I have two or three times the amount of support.
They're both pretty awesome,” he added.
"So it makes it easy.”