Sigyn is married to Loki, and together they have the sons Narfi and Vali. After her husband, Loki had done one trick too many towards the Gods and Goddesses. Loki was bound in a cave with a poisonous serpent over his head. Sigyn who loves Loki more than anything decided to stay with him all day and night, with a bowl in her hands.
Sigyn will be holding the bowl over his head catching the venom, that is dripping from the serpent’s jaws. But when she empties the bowl, some of the drops of venom falls on Loki head, which makes him shake in tremendous pain. This is what is causing the earthquakes in Midgard. Sigyn will stay with Loki until Ragnarok (Ragnarök) “The end of the world”. This is when Loki will break free of his chains, and take his revenge on the Aesir.