Yeah, I'm dropping her, I don't treat cheating as flippant as the average person just because humans are trash in general. There is no form of betrayal as high as infidelity beyond outright killing your partner, but you have essentially killed any sense of trust your partner can have, something like that can be life lasting, effectively acting as killing your partner.
I don't want to dive deep into the morality of it, but as someone that takes "truth" very seriously, you are saying a box of truth lies in front of me, I'm always opening that, no matter the question. Does my mother really love me? Does my partner really love me? I understand your point, but I'm always opening that box.
And trust me, I recognize ignorance is bliss, it's something I almost wish I could partake in, but I'm always opening that box.