Kay, of Quedgeley, Glos., said: "My heart was in my mouth. I couldn't scream because I was so scared.
"I saw the tail poking out from the rim of the loo and thought Brian was playing a trick on me until I saw it moving.
"I couldn't believe it. What on earth was a snake from California doing in my bathroom? Needless to say I couldn't use the lavatory for a while after that!"
Ms Robins and her fiance tried flushing the reptile back down the lavatory but the snake returned and slithered onto the bathroom floor.
Excerpted from Woman's shock at finding snake in lavatory bowl