They call it a pink mass and it’s supposed to “turn her spirit gay” in the afterlife.
The Satanic Temple is a Satanist church based in New York and they've been holding what they call "pink masses" which they claim will make Fred Phelps Jr.’s mother a lesbian the afterlife.
Source: westboro-baptist.com
They've done two so far on Phelps' mother's grave and told VICE that they aren't opposed to doing it to the graves of other Phelps family members.
Source: westboro-baptist.com
Catherine Idalette Johnston is buried in Magnolia Cemetery, Meridian, MS. Other same sex couples are invited to respectfully and tastefully express their mutual affection at Ms. Johnston's gravesite. After a Pink Mass has been performed, every time a same sex couple kisses over the gravesite, the now-gay deceased is said to be pleasured in the afterlife.
It appears as though church members have, also, done a few other things to the gravestone aside from perform masses.
Via: westboro-baptist.com