>>29644
What exactly are they supposed to do? You have a fair point though, they're limited to getting wrung...I like to think you can still get a back and forth if you put some high stakes on the table, like if they cum or give in, they'll be slain, or their family/cause/friends/kingdom etc etc will be doomed. Likewise, there can be a verbal back and forth if it's some sort of interrogation gathering scene...
As far as actual sexual acts go, maybe oft for temptation, and lure the shrunken one in to do whatever they want? If they're attempting to seed and mate with tits or cheeks that tower above them, there's a bit more to work with there. Are they going after the nipple? Is the nipple leaking anything out...? Did they get themselves stuck in their foolish bout of passion, but now it's too late to do anything but struggle to break free from what they wedged themselves between?
If you're kinky, you can try to do nipple vore after they foolishly tried jamming their dick in the nipple. If they are really small, you can perhaps play out something inside the nipple, like it's own little world...or just some dangerous place that fills with melty milk.
You can maybe do something with a strong hero blue, but at the end of the day if they get tiny, odds are they're going to get ragdolled in the final stages.
Sounds like you would enjoy a scene where the blue is more active in their own demise, or sealing their fate. It's that or gradually shrink them, maybe tie it to cumming. So normal sized, then pluhsie sized, then so small they easily get trapped between things... By the end it's ragdoll city, but they can play their part before then. The only other thing I can think of right now is just, again, trying to hone in something beyond just the physical interactions. Energy drain, brainwashing, power sealing, if can enjoy another kink progressing and there being some kinda back and forth with that, then perhaps that would give you something some solo play couldn't?