Just hours before the announcement of her separation was made, Miley was seen kissing Kaitlynn Carter, who recently split from partner Brody Jenner.
Miley and Kaitlynn were on a girls' trip to Lake Como, Italy, joined by Miley's sister Brandi Cyrus and other friends.
"Rock the boat, don't rock the boat baby," Carter captioned the photo.
Miley was not wearing her engagement ring or wedding ring in the photo—which ignited rumours of a Liam Hemsworth split.
The two women were spotted making out, cuddling and soaking up the sun by the water, indicating that their romance may be the reason why Liam and Miley have called it quits.
"They took boat rides together and spent days at the pool where they swam and jumped off a dock into the ocean," a source told E! News.
"They were never far from each other and every few minutes they would pull each other in close and make out under their hats. They seemed to be having a lot of fun together and fully letting loose. They couldn't keep their hands off of each other. They pulled their chairs closer together and would reach across to hold hands or put their arms around each other."
WATCH: Kaitlynn Carter posts Instagram video with Miley Cyrus following Liam Hemsworth split news
In July, Miley opened up to ELLE about her fluidity, saying, "I'm in a hetero relationship, but I still am very sexually attracted to women."
Miley also opened up about not fitting into the stereotypical wife role.
"I think it’s very confusing to people that I’m married," she added.