Kate Hudson may have been trying to make her ex boytoy Nick Jonas "jealous" but we think this risque butt post makes her look just so desperate.

The 36-year-old actress'' stylist and pal Sophia Lopez posted the sudsy snap on her Instagram with the caption "#JustAnotherDayAtTheOffice" -- no doubt to show the JoBro what he's missing.

Hudson feigned shock when she responded with, "Omg! You're so fired! #Fabletics." Umm yeah right -- she probably posted the snap herself!

Umm send that in a private text or something -- it's way less pathetic!

You got kids, honey! Put some clothes on!