I have never wished so fervently for a cat to get laid.
I am intensely angry at whoever allowed this cat to get to maturity without being properly spayed. I am sure that they are not professional breeders and if they were, it wouldn't be allowed out at night to be impregnated by any stray male cat wandering by. It must be as hellish for the poor cat as it is for us to listen to night after night. If you've never heard this loud and painful-sounding yowling, you are lucky.
I hope the owner isn't getting laid either.