It's not maypop, Candice. Maypop is a wild passion fruit and the flowers don't look anything like that. Neither do the leaves.
Are you sure the purple flowers 'belong' to the vine that has the fruits ? Could they be something else growing amongst the vine?
Immature cucumbers or melons would be green. The immature fruits on my Lemon cucumbers were very pale green before they started turning yellow. Mature fruits were the size of a lemon, some large and some smaller and exactly the shape of those in your picture. Is the skin smooth or are there any little sharp-ish bumps on it? Especially the orange-y ones might have almost short thorns on the skin. If they have those, then I'm sure they're cucumbers. If not then
The picture of the interior sure looks like a cuke.
