Things between Kailyn Lowry and her baby daddy Chris Lopez are complicated — to say the least.

The pregnant Teen Mom 2 star has a lot to celebrate this weekend — on Saturday, May 13 she became the first Teen Mom to graduate college with a Bachelor’s Degree and she’s also celebrating Mother’s Day 2017 as a soon-to-be mom of three. But just as things seem like they’re starting to look up for her, her ex-boyfriend decided to send a cryptic message to her on Twitter.

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Guess what today is! 👩🏼‍🎓🖤 #DSU

A post shared by Kailyn Lowry (@kaillowry) on

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On Saturday, May 13 — just hours after Kail posted photos of herself at the Delaware State University commencement ceremony — Chris took to Twitter and simply tweeted, “Congratulations.” He didn’t mention Kail specifically, but many fans are speculating that it was his way of sending a message to his pregnant ex.

https://twitter.com/chris3zero2/status/863424158390251524

When Kail confirmed her third pregnancy back in February, Teen Mom 2 fans were shocked because the news came just two months after she finalized her divorce from her ex-husband Javi Marroquin. The timeline of events left fans wondering who the father of baby No. 3 is and earlier this month, Kail unceremoniously confirmed that her former DSU classmate Chris Lopez was indeed the father of her child.

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Kail’s rep previously confirmed that Chris “is a friend Kail was briefly dating,” according to a statement obtained by Radar Online. But the 25-year-old has been dropping hints recently that their relationship has fizzled out, and she’s even posted cryptic messages on social media suggesting that Chris has not been involved at all during her pregnancy.

But in a now-deleted blog post, Kail didn’t hold back and she opened up about the fact that she’ll have to raise her baby on her own.

“I think I’m most worried about the changes ahead but also that I will have this baby 24/7 by myself with no help. I’m going to be a single parent from the beginning!” she wrote.

Scroll through the gallery below to see photos from Kail’s graduation shoot!