First off, I'd be sexually threatened. And I'm clearly not the first one in this thread to say so.
Then, I'd snap out of my "surprisedness" and ask her why she didn't tell me at the beginning. My actions afterwards would depend on her answers.
That being said, though, I'd rather I wasn't in a relationship with someone who cheats on me and
personally for me that includes starring in porn.
I'd then ask her for more information. What kinds of porn, how often, how long she's been doing that job, etc. She'd need to tell me everything.
Then, at that point I'd ask her why we should keep going with this relationship if she's going to keep secrets from me and cheat on me on a near-daily basis. Of course, since it's, well, porn, it's kind of different to your standard cheating, but still. To me, it's just... iffy.
Plus, regardless of whether or not our relationship involves sex
(and knowing me, it probably wouldn't in the first place), I'm not too keen on the idea of being in one with a partner who regularly does it with others, whether it's part of her job or not.
Of course, if I did my homework before-hand and was more careful about who I went out with in the first place, this entire situation wouldn't be happening at all.
And of course, there's the whole risk-of-catching-something factor to take into consideration. Yegh.
Not to mention, even if our relationship
did involve sex, I find myself extremely uncomfortable with and incredibly grossed out by the notion of... well, having sex with someone who's very recently had someone else's ... you-know-what inside her.
I don't want to share my girlfriend.