Now, the exes are arguing over Thorne's decision to share a video of her reciting a poem about depression. Why? The visuals accompanying the video was taken from video of what appears to be the couple's wedding ceremony — though the validity of the marriage hasn't been confirmed.

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This poem is one of my favorites depression. If u don’t struggle with depression then you don’t know that, depression isn’t being sad some times and u need a pick me up. Depression is something that is deep inside that just stays there. It’s an overwhelming/underwhelming feeling that stays by your side. In your happiest moments of life you can still feel that underlying sadness creeping in reminding you to work on your mental state. That’s why I put depression over this video. It was my best description visually. I didn’t wanna show me in a room sad alone, because many people think u should just “cheer up” or “go have some fun” “hang with your friends” “go party get out of the house!” “ no wonder why ur lonely!” But none of that helps. I hope this poem helps u. I love u and ur not alone. Ps. No, mod and I never really got married, this was one of his bday presents he wanted :) so my friends and I threw together a beautiful night of laughter. #thelifeofawannabemogul

A post shared by BELLA (@bellathorne) on Aug 7, 2019 at 11:38am PDT

That said, Mod Sun wasn't happy to be featured in the post and accused Thorne of using their "wedding video to promote ur book" — The Life of a Wannabe Mogul.

Seriously.....don’t use our wedding video to promote ur book. Don’t disrespect my idea of what love is...if u were faking it that day then u really are an amazing actress. Stop being intentionally hurtful to people healing.

— new song out now (@MODSUN) August 7, 2019

"Don't disrespect my idea of what love is..." he wrote, before adding, "if u were faking it that day then u really are an amazing actress. Stop being intentionally hurtful to people healing."

In response, Thorne shared old screenshots of text messages between the two, in which they talk about sharing the video.

"U just keep lying and u won't stop," she wrote. "I was trying to remember how beautiful we were sad. V sad u brought us to this."

After we broke up..,U just keep lying and u won’t stop, I was trying to remember how beautiful we were sad. V sad u brought us to this. pic.twitter.com/VRtZ1qeLJh

— BITCHIMBELLATHORNE (@bellathorne) August 7, 2019

However, Mod Sun later argued that the texts were from when they were "still trying to work things out." He also shared a screenshot of a comment in which Thorne allegedly "lied + discredited our entire marriage in one sentence."

That text was MAY 2 when we were still trying to work things out..look at what ensued after that. I said u could THEN + I’m shocked u did NOW. What I think is disgusting is ur PS remark where u lied + discredited our entire marriage in one sentence. I haven’t lied once u know it. pic.twitter.com/hHL0h56lD7

— new song out now (@MODSUN) August 7, 2019

He then went on to say that a big reason why he didn't "want to be used in the promotion for ur book" was due to her alleged claiming of his artwork.

Also, now might be a good time to mention why at this point (3 months later) I wouldn’t want to be used in the promotion for ur book....

I did your artwork + u claimed u did it! That’s so disrespectful. I can’t support. Anyone else notice this? @bellathorne pic.twitter.com/JulpOTGhJL

— new song out now (@MODSUN) August 7, 2019

However, this isn't the first time the exes have argued via Twitter. Earlier this year, Thorne criticized Mod Sun for joking about selling her stuff on eBay — an exchange that led to accusations of Mod Sun calling the cops on Thorne while withholding her possessions.

Photo via Getty