Mike Tindall, who is married to William's cousin, Princess Anne and Captain Mark Phillips's daughter Zara Phillips, says father-to-be Prince William – whom he calls "Willy" – will be "outstanding" as a dad, "while Kate is a natural mother," he adds.
The rugby player told the Daily Mirror, "It's great for them. The whole family is really excited about the baby. I think everyone's excited. I'm so happy for those two. They'll be great parents."
Tindall, who wed Phillips nearly two years ago, says children are on their minds, too – in the future.
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Tindall's comments came as William, 30, spoke about the interrupted nights on his horizon when the baby comes along. When William and brother Harry opened a wounded warriors' recovery center run by the charity Help for Heroes, the prince was handed a teddy bear and a onesie with the motif "My Daddy Is A Hero" on it.
Triple amputee Josh Boggi then asked the prince, "Are you looking forward to it, Sir?"
"Very much so," William replied. "But all the mothers have been looking at me [and saying,] 'Just you wait, just you wait. Long sleepless nights.' "