If you fridge them make sure the lid is well ventilated,
dont use coco husk its no use for this,use damp kitchen roll and live moss,not sphagnum!!
they will need to be checked every 2-3 days to make sure they havent dried out.
Spraying lighty will help,dont feed them 10 days before you fridge them,as the food will rot in their gut,
I hibernated animals twice before.both times where Triturus.
I did accidentally breed Hong kong Warty's before.
They laid eggs on plastic plants,cold water change was enough to get them going and Photoperiod,The bulb had blown on the tank and all you could see during the day was white flash on the tails and the newts biting eachother.
I would move the tank to a cooler room and let them breed in their own time which is if its cooler then maybe Autumn. or move them to the garage Good luck with them