[yorwba]

Sure, relationships that start at work/in an uneven power dynamic can absolutely work out, but you only know this afterwards, when everything has run its course.

If someone else had applied for the position as your father's secretary and had been refused, they could have complained about it by pointing to the conflict of interest.

If you want to avoid the negative consequences of mixing work and romance, you'd better not only focus on the best-case result, but also keep the worst case in mind and accordingly tread carefully.