Hello we used to do this quite a bit in the shop back in the early '90. while those levers will work I would recomend something else (also those levers are out of stock). one of these two lever area bit better IMHO because you can adjust how far your Mother has to reach for the lever to apply it.
http://www.freemanscycles.co.uk/prod...&pname=RKL-463 Brake lever 2 finger type
http://www.freemanscycles.co.uk/prod...4&pname=RKL400 Touring lever
fabulous looking mixtie
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk