Phew ! It was a long research but I have found why, since my Pets expansion is installed, the prank option was no more avalaible on the pie menu when I click on a sim. The Pescado antiprankhack.package was the culprit. If my english was better, I should have known the meaning of prank. But on my french version, the name of this option is "farce". Whatever, when I disable antiprankhack, the prank option is back again on the pie menu. I think I can live without antiprankhack now. Excuse my english. I do my best.