The querent’s sister is represented by the 3^rd house and Lord 3, which is Jupiter at 22.54 Aquarius in the 5^th house (planet 5 degrees before a house cusp is considered as being in that next house). The nanny is signified by the 6^th from the 3^rd house which is a radical 8^th house; therefore her significator is Venus at 29.51 Pisces, meaning that the nanny is very strong, in her exaltation. So that's great but the bad news is that she is about to change sign, she will go into Aries where she is very weak. So this is not a good sign as Venus in this position will be in her detriment. The other thing is that she will stop being ruled by Lord 3 (her employer/ the querent's sister), so she won't be doing what she is told. It appears that she is someone who knows how to present herself in a way that pleases her employer and even though she seems to be a great candidate, she will be unable to cope and is too weak to look after the baby well. The interesting thing to notice is that Venus is staying in Pisces only for a very short time, it has been in its detriment, and has just gone back to being exalted for a short moment, and soon will go again into its detriment, this is only confirming that she is not showing her true colours, what you see is not what you will get. The answer is NO, don't hire her.