Credit: Jo Rivera on Twitter

Hands up if you've read Kailyn Lowry's new book? This Teen Mom 2 star's autobiography, Pride Over Pity, recently hit shelves, and it's already a New York Times Bestseller. The book is a candid look at Kailyn's life pre-Teen Mom 2, where she opens up about challenges she faced — including being sexually abused, and dabbling in drugs.

Pride Over Pity is a great way for fans to get to know Kailyn on a more intimate level, and it's full of shocking information about her past. However, it's not just Kailyn's fleet of fan-girls who are eager to read the revelations in her book. Her friends and family are also picking up this page turner, including her son Isaac's grandmother, Janet Rivera (aka Jo Rivera's mom)!

Janet and Kailyn got along pretty well while Kailyn was living at their house and dating Jo, but their relationship took a turn for the awkward when Kailyn and her man broke up. However, Jo recently took to Twitter with a picture of his mom reading Pride Over Pity — how sweet! So, what did Janet think of Kailyn's book?

"Jo knows I’m a huge supporter," she tweeted. "I am truly proud of Kail n wish her much love n success.  #always in my heart."

Aww, Janet! It's so great that she bought a copy of Kailyn's book to read, and hopefully Pride Over Pity will help Janet understand Kailyn's point of view a little bit more.

No word yet as to whether or not Jo himself read the book, but he can always borrow his mom's copy!

Are you surprised that Janet read Kailyn's book? Sound off in the comments.