Ladies only. can masterbating my vagina cause me to pee

My boyfriend likes seeing me in tights/pantyhose which I obliged when we have our intimate time together. I wear panties under my pantyhose. My boyfriend would rub, scratch or otherwise masterbate in my vagina. Then I would end up peeing, discharging into my panties or getting a heavy period flow. I couldn’t hold it in. Is this an orgasm.

Same thing happens when my boyfriend puts a vibrator under me.

Sometimes the pee would flow right out of my panty and pantyhose.

Has this happened to any other woman.