Last Month’s Riddle

If you throw me from the window,
I will leave a grieving wife.
Bring me back, but in the door, and
You’ll see someone giving life!

What am I?

Answer: 
The letter ‘n.’

wiNdow – widow
door – doNor

Thank you to all of you who submitted correct answers, but, unfortunately, we only picked one winner. We hope you try this month’s head scratcher!