An earthbound take on "Alien".
Suk Ching buys an ornament at an auction. The demon (a green slimy lump) inside the ornament has sex with her (see the egg-laying scene from Alien). Her husband sees her acting strangely, and soon dies a horrible death. Shortly after, Suk Ching falls from the railings to her death.
During the funeral, the elder taoist priest notices the dead woman's belly expanding, and guess what jumps out (see the birth scene in Alien).
Ten years pass, and the new demon seems to have found an ideal host - Suk Ching's younger son, whose behaviour becomes, well, demonic.