Why is Sunny Liu Mei pregnant?

In this novel, Liu Mei is pregnant because she has a relationship with Wang Lin and has a child.

According to odd records, in the novel "Fairy Inverse", the reason why Liu Mei got pregnant was that Wang Lin was hidden and recovered after being sealed by the elders of Yin religion, and met Liu Mei again. After that, the two men fought in the tomb of Suzaku, and Wang Lin used the deadly trap sealed by the immortal family, so Liu Mei had a relationship with Wang Lin and had a child.