I'm not sure about Elizabeth, but she could have been the wife of Richard Venus. There are baptisms in St. Mary Cray for their children, Michael (1802), Anne (1804) and Catherine (1807). There isn't a recorded baptism for David (b.1812) who is living with Elizabeth at Reynold's Smith in 1841, but he could have been there son, as Michael was also living at Reynold's Smith, Orpington in 1841 (and 1851) with his wife Matilda Quiddington.