Option 1:
Tatsuya does get mad (because...duh?). Yells, maybe even slaps him. Then probably moves into option 2 because he's whipped.

Option 2:
Depression! Fun. Mopes and generally there's no change. Because he's a wuss, that's why.

Option 3:
Seduction? Hn. "Hey Ren, I did promise I'd make you dinner, right?" Honestly the least likely option because he thinks seduction is like being a whore because his sister fucked up his head.

Options 1+2 also involve him being bitter at Ming. Probably bitter in general in fact. "Should've known I'm always second," etc. Either of them can also result in him going after his sister before he's ready. (Which...this would cause damage to him physically too, chakra restraints, etc.)

Any of these options probably involve Enzan yelling at everyone. (Mostly because he's irritated he's partially at fault for Tatsuya finding out but also because of ONE SHOT THAT NEEDS TO BE WRITTEN where he talks to a therapist on his world and is convinced Tatsuya is suffering emotional abuse consequences. Probably partially blames Renzo (with grounds? Look it up EDIT: Lol, no.) too.)