Last year, prolific San Diego playwright Christian St. Croix gave local theatergoers a taste of his play “We Lovers,” when a 40-minute version debuted at the San Diego International Fringe Festival. Now it’s back in a full-length version that Loud Fridge Theatre Group premiered Saturday at the Light Box Theatre at Arts District Liberty Station. Like many of St. Croix’s other plays, “We Lovers — now 90 minutes in length — is sprinkled with ghosts, monsters and the supernatural. “We Lovers” is the story of a group of neighborhood friends in their 20s who regularly meet up at a campsite to share spooky stories. Kandace Crystal grounds the play with her quiet, strong, maternal presence as Wolf & Bird, a woman happily pregnant with her second child.