Tamara is expecting her first child with husband Jay Rutland and is looking forward to celebrating their impending joy with her girl friends in the coming weeks.
Sister Petra made the elaborate baby shower invitations, which are actually a pale pink box with a traditional gold rattle in.
Sharing a snap on Twitter, Tamara gushed: "The most beautiful baby shower invites I have ever seen. I have the world's best sister."
F1 heiress Tamara married Jay during a lavish three-day ceremony in the French Riviera in June last year.
The couple announced their pregnancy news three months later, saying they felt "lucky" at how quickly it had happened.
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