Mother's 'bedroom tax' worries
The body representing tenants in Wales claims up to 4,000 people could be forced into homelessness over housing benefit changes.
From April, housing association tenants of working age will see benefits cut if they are deemed to have spare bedrooms going unused.
The so-called "bedroom tax" will see benefits cut for social tenants by 14% for one spare room, and 25% for two.
The Department of Work and Pensions said from April 2013 housing benefit entitlement for working-age tenants in the social rented sector will reflect household size, and it expected tenants to make a contribution towards the rent if they are living in accommodation which is larger than they need.
Fiona Dymore, from Caernarfon, Gwynedd, told Arwyn Jones she did not believe her nine-year-old son and daughter of three should be forced to share a room.