ROD STEWART - STEWART SLOWED DOWN BY AGE

ROD STEWART's plans to expand his family with wife PENNY LANCASTER have been hampered by the aging rocker's decreased stamina.
The Maggie May hitmaker and model Lancaster are desperate to add another child to their brood - but their efforts have thus far proved fruitless.
And Stewart, 63, concedes his age may be preventing him from becoming a dad for the eighth time.
He says, "Trust me, I am trying my very hardest to have another child. But I am not quite Superman like I used to be. I am in my 60s now."
But Lancaster disagrees: "He's lying, he is Superman."
The couple have one child, two-year-old son Alastair Wallace.