Combine cake mix, water, eggs and melted butter to a large bowl. Start at low speed then gradually get to medium speed for 4 minutes with your electric mixer.
In a prepared baking pan, pour batter and make sure it is evenly distributed. Bake at 325° for 30 minutes. Take out and let cake cool for at least 20 minutes.
While cooling the cake prepare the sweet milk mixture. In a mixing bowl combine the sweetened condensed milk, evaporated milk, and heavy cream. Whisk to combine. You can add it to a measuring cup with a spout to make pouring easier.
Poke cake with a tooth pick, skewer, or long-tined fork all over. Carefully pour mixture all over the cake. It may appear like there is too much but it is not, make sure to use all of it.
Cover with plastic wrap and store in the fridge for at least 4 hours but up to overnight.
When ready to serve make the whipped topping. In a bowl combine heavy whipping cream, sugar, and vanilla extract. With a hand mixer or stand mixer, mix until stiff peaks are formed.
Spread the whipped cream on the top of the cake evenly. Top with fresh strawberries and enjoy!