Gary Shirley Girlfriend: Kristina Anderson Is Pregnant With 'Teen Mom' Star's Baby [VIDEO]

Gary Shirley will soon welcome his second child.

Amber Portwood And Gary Shirley Run Into His Ex While Filming 'Teen Mom'

As filming continues on the fifth season of Teen Mom, Shirley's girlfriend, Kristina Anderson, has reportedly become pregnant.

“Gary told Amber that Kristina is pregnant with his baby about a month ago,” a source close to the reality star, 24, told Radar Online on Oct. 9.

Amber Portwood Feuds With Gary Shirley Over Comments Made In Her New Tell-All

Shirley, the father of Amber Portwood's five-year-old daughter, Leah, reportedly began dating Anderson when Porwood was behind bars. And although the couple reportedly broke up earlier this year, they are currently together and excited to start a family.

One person who isn't too excited is Portwood.

During a recent MTV special, Portwood opened up about Shirley and Anderson, claiming Shirley cheated on her with Anderson while she planned for their future.

“When I was in prison, Gary was telling me that we were going to be back together, and he was looking for a house for us, and selling me this big dream,” Portwood said. “It was a couple of months before I got out that I found out that he was actually with somebody pretty much the whole time!”

Portwood also hinted Shirley and Anderson had a secret.

“Honestly, they deserve each other,” she said. “You guys will see!”

Portwood and Shirley have been filming the fifth season of Teen Mom for the last few weeks. Portwood's co-stars, Catelynn Lowell and Amber Portwood, are also filming.

Teen Mom season five premieres on MTV in early 2015.