Echoing what Valkyr said about combat and in general. She makes you the pet which is great if you're into that and I personally love the role reversal.
You can unequip her/leave her on the ship if you want a break but if you take her she will initiate scenes on her terms if you don't keep her 'satisfied'.
Oh you can also choose what she referrs to you as from 'nice' names to more hardcore ones which can make the content feel a bit softer ( well, as much as being railed by your owner can =P) or harder.
Also seconding don't let badger add the eggs, it's irreversible and annoying if you don't want to be constantly eggnant.