When राम and लक्ष्मण were in exile in the forests with सीता , रावण came to carry away सीता। At that time the real सीता disappeared in अग्नि and in her place a false सीता was installed. It was this phantom सीता who was carried away by रावण and who lived in लङ्का till the time of रावण 's death. It was this मायासीता whom राम asked to jump into the fire to test her purity. At that time मायासीता disappeared and the real सीता came out from the fire. (See under SĪTĀ) .