Frank and Matt have been lowkey fucking when they run into each other. After Midland Circle, when Matt is very freaked out, Frank ends up having a lot more sex than before as Matt seeks out grounding comfort from it. Jessica follows them because hey, this dude's the fucking Punisher, she can't just trust him alone with Matt; both are aware, after a first time, that she's watching, and so they get progressively filthier and kinkier to give her a better show. And she keeps watching because mumblemumblesafetymumblemumblehotot

Kinks that they develop: verbal humiliation (slut, desperate for it, beg to suck my cock), rimming, deepthroating, predicament bondage, buttplugs, nipple clamps, deliberately angling Matt to spread his legs wider and pull them up to give Jessica a better show, face-slapping, spanking, crawling, and D/s.

Bonus points if after a lot of seeing this Jessica joins in and makes it even kinkier.