How can I invite her over without being creepy?

My parents are out of town for 12 days and I've been texting this girl for a week and a half solid. We are going to lunch tomorrow and I was going to see about inviting her over to maybe watch a move or get in the hot tub this weekend. I would like to invite her over, but I feel like just the fact of inviting her over with my parents being out of town is creepy and sounds like I'm just trying to get action. While it would be nice if that did happen, I mostly just want to hang out with her and see how things go, but if that's what happens then whatever.

I think she'll probably be excited if I ask her because she seems really into me and most of the time she texts me first.
How can I invite her over without being creepy?
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