Yes, according to the provided reference, the Queen of Hearts is the mother of Lizzie Hearts.
The reference explicitly states: "Queen Of Hearts is the mother of Lizzie Hearts..." This confirms the maternal relationship between the two characters. The reference also positions her as one of the two queens of Wonderland, alongside the White Queen. Her appearances in various Ever After High storylines (Thronecoming, Way Too Wonderland, and Spring Unsprung) further cement her role within the narrative.
