Is it normal that i enjoyed it when she puked?

She probably would be embarrassed, good on you for holding back comments.
As for simulating the experience again, why not ask her spit out a mouthful if water on you instead? I imagine you liked the gushing feeling of it, so spitting something could be similar.
I wouldn't say it's normal, and I can't confirm it's at all common, but you certainly aren't alone.
Perhaps after a few times of the water thing she'll ask the origin of the fetish and you can mention the time. She may feel less awkward, but please don't have her throw up regularly. The stomach acids can do so much damage to her mouth and teeth..