At what stage should you assume she wants to come home with you?

It was my birthday a few weeks ago and she took me out for drinks. We got very close, a lot of touching, kissing and hugging. Very positive to whatever I said and did. Her birthday is coming up and I asked her to send me her address so I can send her a gift (we live in different cities) and she said no don't get me anything, we'll just go out again.

On my birthday, we went out on a Sunday and I had work the next day so I had to cut the night early. Around 10pm. Otherwise she wanted to keep it going. For her birthday, it will be a Saturday and i'll have a hotel booked for the night. If we're out until 3am/4am, is it safe to assume she'll want to come back to the hotel?

At what stage should you assume she wants to come home with you?
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