Family Loyalty! Leah Messer's Grandma Slams Cheating & Drug Rumors: 'Let The Truth Reveal Itself'

Leah Messer's in-laws and own husband have been bashing her on social media— but her family is remaining by her side.

After the Teen Mom 2 star's younger sister Victoria slammed Jeremy Calvert and threatened to expose his dirtiest secrets, the sisters' grandmother, Sandy Kay, stepped in to defend the 22-year-old mother of three.

In a rambling Facebook post, Kay accused an unnamed "they" of going after Messer's kids and even suggested the unknown attackers could have a "night cam" to see if she's "having sex with Jeremy so they can make some money."

As for those who say Messer is abusing drugs, Kay said they have a "rude awakening" coming, and "time will let the truth reveal itself."

However, the outspoken grandmother didn't deny that Messer and Calvert, 25, have had their share of issues.

"She and Jeremy will get threw sic there sic problems," she wrote. "They are young."

As RadarOnline.com reported last month, Calvert accused his wife of cheating with ex-boyfriend Robbie Kidd in a Twitter tirade. Messer denied any wrongdoing, and Kidd exclusively told RadarOnline.com that "nothing happened" between the two.

Though Calvert took mentions of his wife down from his Twitter page, Messer has been assuring fans that her marriage is just fine with lovey-dovey tweets.

“Their sic is nothing more important in my life than my husband and my girls!" she gushed on November 2.

Do you think Leah and Jeremy will last? Sound off in the comments.