'Teen Mom 2' star Kailyn Lowry engaged to Javi Marroquin

"Teen Mom 2" star Kailyn Lowry is engaged to Javi Marroquin, her boyfriend of one year.

"It's true!" the young mom tweeted today (Sept. 15). "We're engaged!" Marroquin also posted a picture of the couple with her 2-year-old son, Isaac, with the caption "After she said yes." Both guys are dressed in their fancy finery and clutching bouquets of flowers.

In May, the couple celebrated their commitment with matching infinity tattoos.

The romantic Marroquin explained the ink on Twitter, writing, "We always say I love you to infinity and beyond. So we got the infinity symbol!" Awww.

In the last season's "Teen Mom 2" reunion finale, Kailyn admitted cheating on her boyfriend at the time, Jordan Wenner, with her baby daddy, Jo Rivera.

Kailyn, 20, and Javi, 19, met at the mall -- he was a customer at the Buckle store where she worked.

Do you think the youngsters are marrying too soon? Or considering 19-year-old Miley Cyrus just got engaged to Liam Hemsworth, is this a new trend?