Mojave Moon (movie, 1996)

Al McCord is hanging out at his favourite restaurant when he meets an attractive young woman (Ellie) who is looking for a ride from the city out into the Mojave Desert, where her mother lives. Little does he know that while Ellie is falling in love with him, he is falling for her mother (Julie), despite the nearby presence of Julie's boyfriend who seems likely to go berzerk at any moment. Even more strange, hilarious events follow and it's up to Al to find some explanation. His life may never again be the same.