I do remember the dev saying Bree and Sophie like to share, so sounds like you can get those 2 and lets be honest, that is all that matters.
Indeed...
https://f95zone.to/threads/summer-heat-v0-4-1-naughty-fox-games.107102/post-8326146
But... why do I feel like that response was tongue-in-cheek and this is what he was referring to?
I also doubt he would have revealed such a major thing so eagerly because of how tight-lipped the devs are on other, broader questions:
Of course, if the dev wishes to make an official statement clarifying this matter, please don't leave us hanging.
Personally, I would be surprised if Sophie were okay with sharing the MC, seeing how she's just 19 but already looking for someone to settle down with and start a family. I feel that getting close to both her and Bree would put strain on their friendship when things start getting serious rather than push them into sharing him.
Then there's Eve who acts salty if you hang out with the other girls and also straight-up says that some girls are not into sharing.
Okay, but maybe Mia would be open to it, then?
Overall, I get the impression that the main girls' paths will be mutually exclusive and you will have to choose one in the end. While this is an adult game and the side characters act very porny, the main cast's relationship development seems to follow a much more grounded, romance-focused trajectory.
That doesn't mean there can't be threesome scenes with them, the devs are surely well aware of the high expectations for some three-way fun with Sophie and Bree (and the game does have the 'group sex' tag planned) so they will probably aim to deliver just that, even if it's just a dream sequence... I just have a hard time seeing an ending with both of them.
Anyway, that's just my take. Time will tell what they have planned for our lovelies. I'm a strictly monogamous, mushy kind of guy anyway, so I'll be giving my attention to just one of them... at a time.