Somehow it often turns out - or at least occasionally - that our watches spontaneously change their owners without our explicit consent. It gets presented as a fait accompli, sometimes with the pragmatic argumentation that they look better on the new owne...
She just asked which watch I was going to wear and then decided that the strap matched her dress, so given that I was wearing a different one anyway...
... and other than you I had no chance to get them back ;-) That's why my wife has many more watches than me So, do not stop fighting to get the p15 back! You would regret giving in... Cheers Henrik