You must schedule interview within a certain time of being approved, however, you can change that interview date as many times as you want as long as you change it with at least 24 hours notice. (In you case, you can schedule her interview, and then just keep pushing it back until you get your and your son's approval.)

Anyone else have a data point for how long NEXUS renewals are taking?

i applied in early January (forget the exact date) - my application is still pending review.

I applied in early January and am still waiting as well.

Pending Review
 

We applied January 26, 2017 and are still pending review.

I'm in the same boat (mid-January).

Please update if you see any movement!

Applied for One Renewal and One New Member on 01/15. Still pending review. Please update if anyone applied around the same time and haven't heard back either.

Last time around, was charged CAD$50. This time it was more like CAD$67. The receipt shows the charge in US dollars although I applied from Canada using a Canadian Credit Card so must be the exchange rate.
The website still shows $50 for either in US or Canadian currencies. Anyone else had to pay more than CAD$50 from Canada?

If you applied using the online GOES portal, your payment would be in US$ regardless of citizenship or credit card used. If you filled out the paper form and mailed it to CBSA for processing, then the charge would have been in CDN$.

Still waiting.

Applied: Jan 7, 2017
Conditional Approval: Pending
Interview: Pending
Approval: Pending
Card Arrived Pending

I think the vetting process has come to a grinding halt with all sorts of uncertainty in US policy. I helped my inlaws apply at the same time and nothing. And the estimated wait times have jumped dramatically at the end of Jan and Feb. Will be interesting to see what the number of business days wait is at the end of March. My guess it will be over 60 from the current 47.

Do you have a link To posted business days wait? I was at the page, but now can't seem to find it back.

It is also stickied and linked at the top of this forum page.

I've taken the numbers posted here and cooked them down, just for a short period since October 3 2016 to last known approval. The average wait time is 53 total days, the maximum was 65 total days. These # of days includes weekends.

I expect these to increase. Example: Applicants which applied on January 15 2017, are at 64 total days as of the date of this post.

I've updated the wiki at the top of this page to include published processing time history via archive.org.