I agree with the pp - she's not suffering, I'm sure. At the same time, I don't see why she would regret eating pork if she decides to convert to Judaism. I converted, and I remember having pork as a kid (though I've been vegetarian for years) but I don't have any regrets about it.
Since you are following both traditions, it would seem strange to me to make her adhere to this rule of Judaism. Is she supposed to adhere to BOTH Christian and Jewish "rules"? That seems like a lot to ask of one person. I do not come from an interfaith family so I hope this isn't insensitive, but it seems like she would have to be more of an observer of both religions, since they can't really coexist in one person - that whole trinity thing, for instance
Because of that, I don't think I would make her follow Jewish dietary laws.
As for the pp, I agree. I'm vegetarian, DH is not. DS's favorite food is chicken. I cook meat, so I offer it to him, but if I didn't cook meat then he wouldn't be getting any from me, though I wouldn't mind if he got it elsewhere. I also don't think it would be easier for her to say later on that she wants to eat meat. My reasons for becoming vegetarian no longer exist, but this is just who I am. I don't eat meat. I don't think I ever could, simply because I don't eat meat. Does that make sense?