Kailyn Lowry graduated from Delaware State University over the weekend, and as she celebrated the milestone with her close friends and family members, including her two sons, seven-year-old Isaac and three-year-old Lincoln, the "Teen Mom 2" star seemingly received a tweet from her ex-boyfriend.

On May 14, In Touch Weekly magazine shared a report regarding Lowry and Lopez's complicated relationship and suggested the reality star's third baby daddy may have congratulated Lowry on her special day. "Congratulations," Lopez tweeted -- to no one in particular.

After Lopez's post was shared, several followers on Twitter suggested the post was aimed at Kailyn Lowry, and a couple of commenters weren't impressed with the post and suggested he do more.

"Hope you texted her," one person wrote while another pointed out that he should have more to say to the mother of his child.

Lowry confirmed Lopez as the father of her third child earlier this month after several weeks of speculation. As fans of "Teen Mom 2" may recall, the longtime reality star appeared on an after show months ago but told host Nessa Diab that she wasn't quite ready to reveal the name of her baby's father.

Kailyn Lowry and Chris Lopez dated briefly after her divorce

Lowry and Lopez's romance started in late 2016 after the "Teen Mom 2" star and her now-ex-husband, Javi Marroquin, called it quits. As fans may recall, Lowry's marriage came to an end during the time Marroquin was serving a deployment in Qatar. Months later, after refusing to expand her family while married, Lowry became pregnant with Lopez's child and shortly thereafter, they parted ways.

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Kailyn Lowry may be raising her third child alone

Lowry is already mom to two sons, Isaac, 7, from her past relationship with Jo Rivera, and Lincoln, 3, from her marriage to Marroquin, and soon, she will have a third child with Lopez. That said, while her two previous baby daddies are extremely involved in their children's lives, it is hard to say whether or not Lopez will be helping with Lowry's third child in any way.

While there is surely a possibility that Lopez will step up for the sake of his son or daughter, he hasn't said anything publicly about his involvement with Lowry's pregnancy and has shared just a couple of tweets relating to the matter.

Kailyn Lowry and her family, including Jo Rivera and Javi Marroquin, are currently in production on the eighth season of "Teen Mom 2."