And while it's unclear exactly what the 29-year-old actress is referring to, some have suggested the post may have something to do with her ex's recent Reddit AMA, where the DNCE frontman opened up about losing his virginity to someone named "Ashley."
"I lost my virginity to this girl named Ashley," Jonas said during the AMA.
And while the 27-year-old singer does not mention Greene -- whom he dated when he was 20, the age Jonas previously stated he lost his virginity -- by her last name, he does acknowledge, "You can probably just Google it. It’s pretty easy to figure out. I dated a girl named Ashley, so just Google it to figure out which Ashley that is."
During the Q&A, Jonas went on to share more intimate details about his first time.
"It’s quite a great story because I didn’t have any condoms, so I went to our drummer Jack’s room, who was my roommate at the time, and I demolished his room looking for them," he recalled. "Found them underneath his underwear drawer. When he came home, he thought somebody broke into his room because his whole room was demolished because I was in dire need. Needed to happen then and now. Safety first, kids."