Good catch Zoe, I couldn't sleep so got up after seeing those pics in my head.
IF your pics are color accurate skhetan, those dark green leaves tell us they are getting too much fertilizer, tomatoes typically have a more yellow cast like your 3rd picture of the ripening tomato with that 'bruise' on it, why is it yellow if it is a beefsteak? That bruise looks more like excess water damage causing internal rot.
You do know that when tomatoes ripen, they go from green, to a white color before changing again to orangish to red as they fully ripen? if they are red tomatoes.
Tomatoes aren't houseplants, but your tomato PLANTS are gorgeous- and leaves would tell you they were scalding before the fruit showed damage typically. Reminds me of the story my dad told me of a couple of milk cows, yeah, I know, but bear with me. One cow was gorgeous, beautiful looking, healthy, and gave a good bit of milk(which is the most important fact for a milk cow) but, the other cow? Poor thing, she looked all bones, tired, sad, but she gave 3x the milk the first cow had. All of her energy was being sent to do her job-make milk-and she did. Plants are that way, too. If you want a houseplant it can look gorgeous because that is its job, but if you want fruits, that plant needs different care to do the job the best it can.
Here in Houston, it is a weird year for plants, I literally have lost half of each plant I set out to grow, to hail, to deer, to weather. Not just weather, some of my plants seem to be reacting to solar flares this year. I hear the north is getting some of the southern heat this year, but tomato vines just stop setting fruit if it gets too hot for the fruit, the vines usually don't die from it, and where you live can return for summer harvests. For me, once we hit the 90*s steady, it doesn't cool down til Nov enough for our tomatoes. I wish you luck.
