Rod Stewart is preparing himself for life as a father of eight - because his model/photographer wife Penny Lancaster wants another baby. The pretty blonde, 36, gave birth to her first child with Stewart, son Alastair, in November 2005 - and is already planning to add to the brood. She says, "We hope there will be another one. We're planning on it and hopefully after (British reality TV show) Strictly Come Dancing we'll start trying again." And Lancaster admits the birth of the 22-month-old has brought Stewart's other six children from past relationships closer together. She adds, "The children see us as more of a family unit now we've got Alastair. They see that I'm here to stay. "I think it makes them feel secure, that it's brought us all much tighter. Having Alastair made us complete." The Maggie May singer, 62, is dad to 28-year-old Kimberly and her younger brother Sean (from his relationship with Alana Hamilton); 20-year-old Ruby (by Kelly Emberg); teenagers Renee and Liam (from his second marriage to model Rachel Hunter), and 33-year-old Sarah Streeter, who was put up for adoption shortly after birth.