Will Silk Continue to Shrink After Washing?

Dear Home Ec 101,

I washed, but did not dry, my 4 year-old’s dress that says it’s dry clean only – who makes dry clean only clothes for 4-year-olds, anyway? I didn’t even think to check. It is 100% silk. It shrank quite a bit and while it was still wet I was able to stretch it back out a little (but not all the way).