After meeting in person, they realised they were gay] At the time, they lived 4,207 miles apart with a five hour time difference, with Sue based in Florida and Heather from Luton, Bedfordshire.
Now, the couple live together and are happily married, even recently attending Heather's ex-husband's wedding, as well as the Globe Theatre - where her ex proposed 12 years ago.
Sue had also been married to a man for 35 years, but after bonding over Star Trek on social media, they soon realised their love transcended age, gender, and the huge distance between them.
The couple say they aren't bothered by the age gap and haven't had any negative reactions from strangers, although they do say there have been occasions where Sue has been mistaken for Heather's mum and they have to explain that they are actually married.
Heather McGreachy-Irwin, 36, had been married to a man for seven years when she met her wife Sue, 68, on Twitter in 2020.