As there is no gardener insight and the lemon and banana trees were suffocated by this squash plant, I decided to take the kitchen scissors and do some gardening. Although I tried to be careful, I accidentally cut of the long string with the fruit (picture http://365project.org/ingrid01/365/2019-09-16 ).
Anyway, it looks like I might get a second chance to see what kind of fruit/vegetable this will be!