Attack of the Fifty Foot Tranny! (1998)

There are a million stories in the naked city. Sylvia was two of them.

Christy is plagued by a cheating husband and a scheming "Best Friend." Upon leaving a party, she is startled by a bright light in the northern sky. Out of nowhere she is spirited to a spaceship where she undergoes a sexual transformation of mythic proportion. Only to exact a nasty revenge on the husband and friend who betrayed her.