Credit: Adam Bouska/NOH8 Photo: Nia Peeple's NOH8 Campaign Photo

Back in December, we saw Pretty Little Liars' Shay Mitchell (Emily) pose for the NOH8 Campaign, and now her on-screen mama, Nia Peeples (Pam Fields), has joined the powerful photo project with this sexy ad.

Nia posted her stunning campaign photo to Twitter earlier in the week and wrote, "mama fields is in texas taking photos with noh8 to back her daughter up!"

In response to the seductive photo, Shay tweeted, "Hot mama Fields!!! Wowza! Great photo Nia, I love it! #noh8 !!!

NOH8, of course, is the marriage equality organization that was started back in 2008 in response to California’s controversial Proposition 8, which made gay marriage illegal. The campaign has become wildly popular with celebrities who all pose with duct tape on their mouths to symbolize those silenced by homophobic legislation.

Pick up your own copy of Nia and Shay's photos on the NOH8 website.

Pretty Little Liars airs Mondays at 8 pm ET/PT on ABC Family.

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