Rod Stewart's wife Penny Lancaster has slapped him with a sex ban - because she is exhausted after rehearsals for British TV show STRICTLY COME DANCING. The model, 36, has wowed audiences on the televised dance contest - but has been forced to deny Stewart love-making of any kind, preferring to use her spare time to care for their son Alastair, one. She says, "Rod understands all in all, but the show is a passion killer. "There's looking after my son as well as doing all the rehearsals and I'm really exhausted to be honest."