It's bad enough the mc didn't know Sage's last name after hanging out with her for months (like as an adopted kid her surname would be "Burke"), but if the mc is too stupid to know his own mom's surname...
mc: "Dad, what was Mom's surname?"
Neil: "Now let me think, ummm, was it Burger King, yeah, something like that, hmm, it's on the tip of my tongue..."
mc: "Oh for fucks sake, just forget about it you dumb cunt!"
Neil: "(I'm sorry son, but you mustn't learn of your mom's past, not until the timing is right")
mc: "Dad, how come we never visit mom's grave?"
Neil: "Good point son, let's go visit it today, now if only I could recall where we buried her..."
mc: "Are you kidding me, how fucking stupid are you!?"
Neil: "(Soon Fuckface, soon your legacy will be revealed, but not yet...)
mc: "Are you alright Dad, it looks like you're trying to take a shit or something?"
Neil: "Oh, no, sorry, just deep in though..."
Neil: "All these secrets, soon my boy, soon DPC will reveal all and the readers will blow their loads!"
mc: "What?!"
Neil: "What? (Oh fuck, did I just say that out loud!?)"