My dad's been having sex with me whenever he wants

My (F18..) dad (M33) have been having sex a lot even though he just took my virginity a few days ago. I love it but at the same time I been really sore recently. Last night into today he's been really horny I guess because he's been undressing me and we fuck whenever he wants. I guess because of my ago I can keep up but it still hurts and feels really good. And even a couple hours ago in the rain he took me outside while the rest of the family was either asleep or at work and fucked me on the ground then we got in the shower and he fucked me again. I think within the last twenty four hours he's came in or on me seven times about. Is that normal?