welcome hairpeace!

please call up MPO and explain the situation. be sure to leave them your mobile phone #s.
and ask them to put such note into your hubby/son's reservation
(in future, you should perhaps book the travel under the same PNR -- i.e. reservation record)

WL usually clear between the 24-72 hour window. So be patient, there is a good chance that they will call up your cell phone and let you know then. the chance should be pretty good for you if: when you check the seat map there are many unassigned seats (see link below -- but it the flight is sold out it may not let you see the seat map, in that case, you can ask MPO agent her how many unassigned seats are there, they are happy to tell you these kinds of info)
that is, if there is a seat, they would get it.

CX agent will typically call up every single pax with a reservation in the 48-72 hr window to reconfirm.

you could also call them about 2 days before the flight (if WL hasnt cleared yet) to check.

in several occasions I was told the WL was cleared some 1-2 days before the flight. i was CX Diamond on A class ticket

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in fact, since it is the CNY. the seat werent released mainly for the overbooking of the coach cabin.
so i would suggest you tell MPO to swap your upgraded sweat with your husband, WL your son's. and DON't upgrade your own. because 90% of the cases you will be op up'ed because the flight will be very full -- Y pas upgraded to J, and J pax will be upgraded to F (and you are #1 or #2 in that upgrade list)
(if not, you still have the chance to upgrade with mile in the airport)

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if you let us know your date/flt #, we can look up the reservation for you and check the chance for WL and op-up for you.
you can also do it yourself at this link
http://flyaow.com/classcathay.htm
or
https://www.itn.net/cgi/air?stamp=63...12+pm&x=47&y=6

if it returned "flight is sold out" that mean op upgrade is very likely for you.