Joan Delaney?!

Does anyone know what became of Joan Delaney? I see she was a model and made movies from 1967-71. then seems to have disappeared till she made a brief appearance in Scenes from the Mall in 1991. As a young man and teen back then I always thought she was the most stunningly beautiful girl I have ever scene and still think that. I just wondered if anyone knew anything about her history and why she dropped out from what seemed like a promising acting career.