actually just. in general, you and your dad both struggling with getting relationships. of course it makes sense, then, to just be each other's date! and you can finally stop pretending you're not eyeing each other up in the shower or in bed and treat each other right. i dunno. i think like a good half of the appeal of this kink is "finally we can stop pretending" for me lmao
oh my god absolutely. like, the sexual tension is 90% of it, the other 10 being "oh my god fucking finally i can stop acting like i dont stare at you chewing on my lip for 90% of our time together. i can stop pretending i dont want to jerk you off under the table every time we go out. i can stop hoping that one day we get far enough away from home that we get mistaken for a couple and you don't correct them" right