Washing Machine causes sink overflow

I am a relativelynew Homeowner and whenever my wife uses the washing machine, water appears in the kitchen sinks (about 6 inches high) and then subsides. This has just started over the last 4 months and slowly gotten increasingly worse.
I would love to avoid a large plumbing bill as we are struggling to keep bills paid now. Any suggestions??
Thanks
Dale & Dawn

Washer causes sink to overflow

It sounds to me like your washer drain is ahead of the sink drain and the drain is partly clogged just past the sink. A washer dumps a large amount of water very quickly, so the sink would still drain OK, but when the washer cycles, that large volume of water just can't get past the clog. Get a plumber to auger the drain and stay away from the chemicals. If you have used or do use a chemical prior to calling the plumber, tell him/her what, how much, and when you used it.