my friend, the one thing I think that might quell some issues is to remove the choose your age and choose the relationship options. Really, they add nothing to your already great game. He is her step-father…and same for the sisters. He came into their lives when they were young. They all are now unquestionably over 18. With all that nothing should hurt reasonable persons‘ sensibilities.
This work is too good to suffer from unintentional story issues. So looking forward to your follow on works. SK.