What does Kailyn Lowry think of Javi Marroquin's new girlfriend, "Real World" star Madison Channing Walls? While the "Teen Mom 2" star hasn't yet commented publicly on the romance, a new report claims she's secretly keeping an eye on Walls online.

"[Kailyn] says she’s so over [Javi] and doesn’t care that he’s got a new girlfriend, but she’s acting real jealous," a source revealed to Hollywood Life on Thursday, March 23. "She’s been checking out [Madison] on social media since she found out about her and Javi."

Kailyn Lowry and Javi Marroquin called it quits on their marriage last May after three years and one child, son Lincoln Marshall Marroquin, 3.

Months later, Lowry became pregnant with her third child with another man and Marroquin moved on with Cassie Bucko. Then, after just one month of dating, the couple called it quits.

Javi Marroquin and Madison Channing Walls went public with their romance this month

Just about one month after Kailyn Lowry confirmed she was expecting her third child (she also has an older son, Isaac, 7, with ex-boyfriend Jo Rivera), Marroquin and Walls publicly confirmed their romance with a joint outing in Philadelphia, Pennsylvania. Meanwhile, Lowry was busy facing backlash for her decision to get pregnant with another man's baby, which she attempted to explain on her blog.

As fans will recall, Lowry claimed she decided to get pregnant due to health complications which nearly stripped away her chances at a future pregnancy.

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She didn't, however, reveal what those complications were.

Kailyn Lowry doesn't want her boys around Madison Channing Walls

“Javi can date whoever he wants, but [Kailyn Lowry] really doesn’t want her sons around her," the source explained to Hollywood Life, adding that the "Teen Mom 2" star attempts to control Marroquin by using her children against him. The insider went on to reveal that Lowry was "threatened" by Madison's looks and "perfect bikini body," especially considering she's been feeling quite "big" due to her pregnancy.

To see more of Kailyn Lowry, Javi Marroquin and their co-stars, tune into "Teen Mom 2" Season 7B on Monday nights at 9 p.m. on MTV.