When is the best time to have unprotected sex with my partner without the risk of her getting pregnant

Its called the rythym method and she has to track her periods on the calendar to know when she is not fertile, but even then there is no guarantee that she won't get pregnant.

Tick

The best time would be after menopause. She still might have a slight chance though. Other than that there is no such time were she won't get pregnant.

Why do you want to have unprotected sex so badly?

There's more then the risk of pregnancy to worry about, there are also STD's.

Bottom line, sex= babies, even if you're using protection there's the chance of pregnancy.

Tick is right about the rhythm method, I know a few friends that have used it. Their kids are beautiful!

No time. Having sexual intercourse risks pregnancy, period. There are times with the risk is reduced, but never eliminated.