Clandestine

Frank Castle, your father's long lost best friend, seems to have come back from the dead when he appears at y/n's doorstep.
He has secrets she can't know, and she has one NO ONE can find out about. And its about him..
Their proximity leads to one thing then the other, as he has taken up camp in her guest suite.. everyone's so happy Frank is here.. and she wishes he would leave because she's having horrible feelings for him.. attraction.. AND SHE HAS A BOYFRIEND!
How will she deal with such agony? And how will he deal with such conflicting and forbidden feelings about a girl he watched grow up? Surely it is allowed now that she's 100% a fully grown woman.. is it wrong?

(THIS STORY IS ALSO ON AO3, written by me :))