SM knows that this is unfair to Han. But he can't quite accept Han's jealousy either.
So there's a tension between them always, and it might not ever get resolved. Or only after a few more years of personal growth & maturity & all that stuff.
(I have a whole-ass document with my RPF thoughts on which skz are into which other skz & what their dyamics & kinks are. Which could turn into fic at some point? Unclear.)