Is it normal to feel extra horny during you're period?

Yes that's super normal!!

Also, pro tip if you want to speed your period up, orgasming causes contractions and pushes the blood out faster, which will ultimately shorten your period, so maybe listen to the horniness! hahahaha

Absolutely! I think you made a little typo, though

My wife begs me during her period I give in

Some women do experience this, and it seems to be due to hormonal fluctuations as well as increased blood flow to the pelvis and pressure on nerves there.

Some women also experience a peak of horniness at the time of ovulation.