She divorces!

Last child moves out

When she gets married-the wedding planning is done!

Retires.

The school bus picks up the kids.

Oh I can't wait to see what this answer is!

I'll guess die.....there's nothing out there I can see that would reduce stress better....although Rob's kinda on to something..... ;)

No longer married.

Has a glass of wine (or two)

gets her hair done

pedicure/manicure

LOL Jim! I can imagine that to be true....

One more guess....finds the toilet seat was put down after use.

-when she hits menopause

Rob & dees, you guys are hilarious. And what do you bet the opposite happens to a guy when his wife leaves him? "You mean I have to clean up after myself now? Fold my own clothes? Wipe my own________? I'm stressed out!" ;-) Anyway, I'll guess her stress decreases when she shuts down her social media accounts. Also, when she gets some nookie.

Wins the lottery....big! $$

Hires a maid...housekeeper....nanny...gardener...personal trainer...financial advisor.

Hires a masseuse.

When she is finally really alone-husband dies......seen this when FIL passed years ago-complete change in MIL.

I like the menopause one.

Other guesses:
Her kids get married

Her DH goes back to work after time off

She hits middle age

Hey Jay! For this time, snidely is right. I did answer for myself ;)

For him, he went from the frying pan into the fire, so there you go. But he doesn't have to clean up after himself, from what I hear.

She conceives.