There is a power imbalance when dating your daughter. Just like a teacher is generally not allowed to date their student. So there is an issue with dating your daughter.
The point is incestuous relationships were forbidden because they lead a higher probability of genetic defects in the offspring. They were also forbidden if they are not consensual like any other sexual relationships.
Clearly dating your daughter isn’t consensual given the imbalance of power at play. That’s also why pedophile relationships are forbidden.
There is a power imbalance when dating your daughter. Just like a teacher is generally not allowed to date their student. So there is an issue with dating your daughter.
So… okay if it’s my sister, then?
The point is incestuous relationships were forbidden because they lead a higher probability of genetic defects in the offspring. They were also forbidden if they are not consensual like any other sexual relationships.
Clearly dating your daughter isn’t consensual given the imbalance of power at play. That’s also why pedophile relationships are forbidden.
If you started being together not knowing you were siblings, like here, then no.
From a narrow ethical standpoint, there is no issue I can see?
No, because there is a high chance of genetic defects if you accidentally have a child.