March 26, 2013 at 2:14 PM ET
"Teen Mom 2" star Kailyn Lowry is pregnant again, her sister-in-law told In Touch Weekly.
The 21-year-old is said to be expecting her second child, first with husband Javi Marroquin.
The news comes just a day after the reality star was shown assaulting then-boyfriend Marroquin in a controversial episode of the MTV docu-series. The couple reconciled shortly afterward and married in September 2012.
According to Lidia Marroquin, the 20-year-old military man's sister, "They're overjoyed! When Kailyn told Javi, he cried."
Although the baby, due this fall, wasn't planned, "they weren't preventing it, either," a friend of the reality star told the magazine.
Kailyn's co-star, Leah Calvert, 20, recently gave birth to her third daughter. She and her second husband, Jeremy, welcomed Adalynn on Feb. 4.
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