Grateful daughter

Story from the daughter's point of view. Her father is long time alone, works hard to support her and pay for her, has no personal life because of that

After few failed relationships with boyfriends she starting to understand that she really wants to be with her father, to make him happy not some random dude

Important details:

1) She is questioning morality of such thoughts herself
2) She is not very sexually active and she never actively seduced anyone. That's a new experience for her
3) She is not 18 year old and not a virgin (really tired of that in stories). 20-24, college student
4) Her father shouldn't react like - " Hey, dad wanna fuck?" " Sure!". He should react like normal caring father would... At first