First off, sorry for all caps on the title. I've never done that before and will try never to again. It's just that for me this is huge. I will explain:

My former boss and I have always had a lot of sexual tension between us. She is 40 but I am 21, so it has always been awkward talking about the sexual interest between us. Now that she is not my boss I've been moving toward asking her out on a date. However, I got a text from her at 12:30 last night (she's never done this and no she wasn't drunk). Our entire convo was via text. It went like this:

Her: What's Up?
Me: Well I bought a case of yuengling, but my friends went to hang with their girlfriends so...no party
Her: Sorry about your friends. It happens to the best of us.
Me: So what are you doing up so late?
Her: What are you doing up so late?
Me: I'm 21. I don't know what sleep is.
Her: You make me wish I were 21. How does it feel?
Me: Well I have been since last October, but it's nice to be able to buy beer.
Her: Maybe you will let me buy you a beer.
Me: Well I could bring the yuengling over.
Her: Should have called earlier. I would have helped with that, but I'm in my PJ's. Don't want to scare you.
Me: Believe me. That does not scare me.
Her: You are sweet. I need you. You're good for my ego. How about that beer sometime this week?
Me: Sure. What day is good for you?
Her: How about Tuesday?
Me: Tuesday's perfect.
Her: Sounds Good. Where do you want to go?
Me. Restaurant or bar?
Her: Restaurant.
Me: How about [restaurant] at 7:30?
Her:Awesome. Looking forward to it.
Me: Don't forget. You owe me a beer.
Her: Alright. What do you owe me?
Me: Pick your pleasure
Her: Very good I will. I'll need to think this through. I don't want to waste it on something trivial.
Me: Have anything in mind. I'm sure there must be something...
Her: I'm sure there is. You're a big boy. Maybe you can figure it out.
Me: Oh I can figure it out. Are you sure you're up for it?
Her: Absolutely.
Me: Sounds like fun. Are you sure [the restaurant] is appropriate for that?
Her: Well what did you have in mind?
Me: Well there is something I've wanted to do for awhile.
Her: What might that be?
Me. You're a big girl. I'm sure you can figure it out.
Her: I knew you would say that.
Me: Well take you best guess.
Her: Do I want to divulge or do I just want to contemplate?
Me: Divulge a little leave the details to me.
Her: My phone is about dead. This conversation...To be continued...
Me: Goodnight. Don't forget...date on Tuesday.
Her: I won't. Goodnight

Ok, so now comes your part. I've studied the basic of PUA, but not much. I'm experienced with girls, but she is older than me and that makes me unsure. Just please help me out with what I should be doing to f-close this thing. Any comments are appreciated.

Well the next night I texted her "hey what about continuing our conversation" and I received no answer. I resisted the urge to text her again, but now not sure how long I should wait before I call/text again. At least want to make sure we're still on for our date Tuesday.

That was a great text conversation. You had me grinning the whole time.

Don't sweat her lack of response. She's probably second guessing herself. There is a big age gap between the two of you. All your life you've been with girls your own age: fresh faces, tight bodies, perky breasts. She's probably very worried about having to compete with girls like that physically with your expectations and standards of women. By her responses she was definitely into you. The reality of it probably scared her. Let her mull it over for a few days. Eventually her curiosity/lust/need for adventure will win her over and she'll contact you.

If she doesn't respond in a week, text her offering a movie night to watch "The Graduate".

I think we got past the age thing by now. We met last night and had a few beers together. She told me she wants to pursue a relationship with me, but wants to wait until her divorce is finalized, which looks like that could be August. At one point she said, "I'm sorry if I'm not looking you in the eye. It's just I'll want to kiss you." I told her to just go with what her heart tells her, and not to have any regrets. Later I put my hand on her leg and she moved it, saying it was turning her on too much, and her morals won't let her cheat. Eventually we moved in for some making out, and all of the sudden she stopped and said, "I have to go. I'll call you." I knew not to chase her so I let her go. I know we'll eventually be together, but I want to strike while the iron's hot. Any ideas?