If she accepts the offer of a drink is that a good sign?

This woman I was in a meeting with this week:

* Came in and sat in front of me (when there were lots of vacant spaces available.)

* We smiled & said 'hello' to each other. Into the meeting I noticed her moving her head to the side often, (as if she was trying to see me out the corner of her eye) so I ignored it & put it down to her nerves maybe?

* In the canteen I collected my food then sat down (again lots of vacant tables) & the lady who I kind of know came in & sat at the same table as me - I was surprised! lol

* She seemed to give me direct eye contact quite a lot, and at one point she touched my arm when she was talking.

When I asked her out for a drink tonight by text, she replied saying that she was busy that day but will go for a drink with me another day. She also asked if I was going to the meeting again tomorrow. Told me to have a nice evening & to take care of myself.

She is a divorced 46yr old woman & I am a tall 23yr old man.

Do I have a good chance with her or is she just being friendly, don't want to misinterpret the signs.

If she accepts the offer of a drink is that a good sign?
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