Well, the sister in law certainly thinks she does. Then again, she may not have any more of an idea than the OP does…
It’s neither, simply a statement of fact.
Exactly (the bolded part).
It might just seem like a good idea, when you’re not either one of the people involved.
You know that sound the Flintstone’s feetwould make when they were getting ready to run away and their feet were spinning so fast they looked like a pinwheel? Your feet need to make that sound.
So how are you feeling now, regarding the advice you’ve been given, about calling her back up? If you do call her be sure and let us know how it goes.
Quartz, do you even want to go out with this woman? Do you have sexual feelings, either toward her or even in general? You haven’t mentioned even one time how this situation makes you feel. For a 46-year-old virgin, you seem awfully blase about this. I’ve been single for 3 1/2 months, and I’m going bonkers…
I see this on message boards a lot. The OP will get lots of feed back to the original question but provides very little information past that. Mostly just yes or nos. I’d be curious myself to know more about the OPs feelings in this.
Interesting cartoon trivia: that sound is called ‘temple block riot (medium)’.
http://www.stockmusic.com/sound_effects/cartoon__comedy/comedy_percussion_wood_blocks?snd_id=321476
Don’t bother unless she asks about you again and in a very specific way, like “is Quartz still single? He seemed nice.” And tell your brother and sister-in-law this. They’re probably just trying to be helpful, but it’s not working.
Glad to see you’re putting your feet in the water again, though. I think you’ll make a great partner to someone someday.
I am not going to be making contact.
She seemed nice. I enjoyed her company.
There was no instant reaction, but be assured that I do have sexual feelings.
I deliberately didn’t say. But since you ask, I enjoyed her company.
I’ve had decades to get used to it.
Stop that! 
You’re making me blush!
Ha! This is great because it’s almost exactly how I read this OP.
Quartz: Wanna go out?
Woman: No!
Quartz: So… yes?
Glad you’re not going to be making contact. Wise choice.
There’s also the potential for serious trouble to come out of rank miscommunication.
I have to disagree with Whynot. She’s an adult. If she’s letting embarrassment over a bad day hold her back, I’m not sure she’s ready for a relationship anyway.
My approach would be, if SIL brings it up again, just tell her that this woman told you no, but if she has changed her mind, you’d be totally fine with her reaching out to you again. SIL can pass that info along and the woman can decide for herself what she wants to do with it. But really, the reversal has to come directly from her, not from SIL or you.
Why do I keep getting the feeling more and more that you, MeanOldLady, should be the only one around here with posting privileges?
I agree with the person who said If your in-laws want you two to get together, they should set up dinner or something.
And it is “bury the lead.”
Good for you. I’m glad you listened to your fellow dopers advise.
You seem like a nice guy, I hope you find someone soon to share your time with.
No, lead.
Wadsworth: Sorry, I meant “no” meaning “yes.”
Colonel Mustard: “‘No’ meaning ‘yes’?!?”
I’m putting that in my wedding vows.
I guess neither of you are journalists.
Is it wrong that I mentally read this in the voice of Pam Poovey, followed by Cheryl saying, “Sploosh!”?
Stranger
Yeah, “lede” is newspaper jargon. Interesting story about it here. I learned the “lede” spelling in journalism classes, but it’s always looked a bit dumb to me.