Malvina was an evil witch who was once in love with the man in the painting but had became angry with him since he proposed to another witch and cursed him by zapping him into a portrait hanging in a museum and the spell would last for 1000 years unless it was broken, Samantha would find the man and zap him out until Malvina would zap Samantha into the portrait herself sending her to King Henry VII's court in the 16th century.  Malvina appeared in "How not to Lose your Head to King Henry VII".