also first, why wait for them to finish xD kick em out, lock the door, tell them never to return or the cops will come, second same thing why waste time with insults, just kick em out.
also there isn't a single ounce of blame to tohru, if she can get herself to cheat she doesn't love him, cheaters never actually love their victims, (lol can't believe i'm giving a life lesson here, but if you ever even think about cheating it's better off to break up or divorce, cuz all you'll do is have fun while betraying someone who loves you, while you clearly feel nothing for them.) cheaters might pretend to love their victims, might even convince themselves, but it's not real.
still I can't help but respect Tohru on the keep akie ending, as he mainly decides to keep the marriage going for Riku's sake, still the trust is gone so it's also understandable he made the ultimatum "contract"
"edit" turns out...it's not that hard to almost get stolen... a guy who was so kind to me and really made me feel, safe, and loved...(not to mention a pretty decent ahem size) almost stole me away from my gf...and yes i'm a girl.I tried ending things then he fought for me and we got even closer, then he admitted to trying to push me away from her, his possessive nature of me was very attractive at the time... but i also knew i had to stop it somehow...i didn't tell my gf as i didn't want to burden her and thought i'd deal with it myself, but his honeyed wrds broke through each time...until i eventually told her and she gave me the strength to end it, in the end i managed to stay with my love and our love is stronger than ever (I do be full blown lesbian now too)...but Everything I wrote is...wrong, not her fault either...some guys...just now how to do it. (ps technically no cheating cuz it is an open relationship, but i did fall in love) (all in all they should tell their loved ones cuz in my experience, keeping it hidden to not burden them and deal with that alone is dangerous