An unnamed drug dealer sold Mercedes McQueen drugs, which she intended to use to spike Donna-Marie Quinn, in August 2021. Upon seeing Mercedes, the dealer recognised her as Liam Donovan's ex-girlfriend, but remarked that he did not miss Liam. The dealer thought that Mercedes was planning on using the drugs. Mercedes told him that she had a "friend" who was "determined to ruin her life", and that she was going to help her do so. The dealer then left.