Preheat your oven to 350°F (175°C).
In a large bowl, mix the cake mix, eggs, and water until combined.
Fold in the pureed strawberries into the cake batter.
Pour the batter into a greased 9x13 inch baking dish.
Bake for 30 minutes or until a toothpick comes out clean.
Allow the cake to cool completely.
Once cooled, poke holes all over the cake using a fork.
In a separate bowl, mix the sweetened condensed milk and strawberry gelatin.
Pour the gelatin mixture over the poked cake, ensuring it seeps into the holes.
Refrigerate the cake for at least 2 hours to allow flavors to meld.