Farrah Abraham is convinced that Amber Portwood planned to get pregnant with her new boyfriend in an effort to land herself a bonus from MTV. According to a new tweet, Abraham is taking aim at her co-star after watching her learn of her baby news on last night's episode of "Teen Mom OG."

"[Amber Portwood] just f**king admit you planned your pregnancy," Farrah Abraham tweeted on January 15. "This is so pathetic." Abraham went on to encourage her co-star to enjoy the bonus she'll be getting for her second child, which will reportedly be worth $20,000, and told her to use the money to pay the child support she currently owes her former boyfriend, Gary Shirley.

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Farrah Abraham thinks Amber is the 'worst mom'

"Worst mom award [Amber Portwood]," Farrah Abraham added. And she isn't the only one who is feels that Portwood needs to step up.

As fans saw during last night's new episode of the MTV reality show, Portwood's ex-boyfriend, Gary Shirley, is also concerned about how much time she spends away [VIDEO] from their nine-year-old daughter Leah. He even began talking to his wife, Kristina Anderson, about having her adopt Leah as her own.

As Amber Portwood continues to enjoy time on the west coast, where her boyfriend is from, fans continue to send backlash and criticism her way. In fact, the reality star has gotten so much criticism in recent weeks that she disabled comments on a number of her Instagram photos, including the ones shared of Andrew Glennon and her daughter.

Amber Portwood announced her baby news last year

Amber Portwood and Andrew Glennon went public with their relationship on Instagram in mid-August of last year and in September, just weeks later, Portwood and Glennon traveled to Hawaii for vacation.

During their trip, as "Teen Mom OG" fans saw on Monday, Portwood admitted she wasn't feeling like herself and ultimately took a pregnancy test, which confirmed she was expecting her second child. In the weeks since, Portwood has been staying active on social media and at the end of last year, both she Glennon, who she met while filming a WEtv series, confirmed their baby was a boy.

To see more of Farrah Abraham, Amber Portwood, Gary Shirley, and their co-stars, including Andrew Glennon [VIDEO], Catelynn Lowell, Tyler Baltierra, Maci Bookout, Ryan Edwards, Taylor McKinney, and Kristina Anderson, don't miss the new episodes of the seventh season of "Teen Mom OG" on Monday nights at 9 p.m.