1, it may be suspended animation! People sometimes pretend to be dead and may be resurrected later, so the ancients demanded death for 7 days. Make sure you are really dead, and then bury!
2. If your wife believed in Buddhism before her death, or was a very devout believer of other sects, or someone crossed her over after her death and went to "heaven" or "western paradise" after her death, then her body would be soft! Then I really want to congratulate her!