Peach Surprise

1 14-oz. can sweetened condensed milk
Juice from 2 large lemons
3 cups fresh peaches, peeled and sliced (or 1 large can of peaches, sliced)
1 prepared graham cracker piecrust
4 oz. whipped cream or topping

Combine milk and lemon juice. Stir in peaches, and pour into piecrust. Top with whipped topping. Chill until set and ready to serve.