Nope, there's no harem ending.
If ICSTOR asks me to write a harem ending for Milfy City then I'm 100% up for doing it.
I'd want to be able to do it properly though, not just have it randomly dropped at the end with no build up
I'd liks to see introducing the idea to the girls, explaining that you've also been sleeping with someone else, going on a date with two at the same time, and then building up towards threesomes.
There's interesting dynamics to be explored with Sara+Caroline and Linda+Sara threesomes given Sara's insane possesiveness.
I'm just brainstorming at this point, but Linda+Caroline could lean more into some light femdom stuff since they're both older than the main character.
Then at the conclusion of the harem route a group date and a sex scene with MC and the 3 main girls.
Dates should be easy enough, there's plenty of locations on the map that could be used to add more life to them. The mall, college, nightclub etc.