One LibDem MEP has been caught employing his girlfriend and then massively hiking her salary.
That is one reason why I have said that I will never employ a member of my family in any way shape or form. Even if this employment is totally legitimate, the salary is justified and she is working very hard for the money, then the public will still be suspicious because of the way it looks. Answer: be above board and look like you are above board by staying away from employing family* in this way.
*I am very aware that a girlfriend is not a relative as such, but apparently their relationship is well known and, to me, the same rules should apply.