Well, for one thing, senegals don't need to be DNA'd because the females and the males look differently. But, going back to her biting, if I were you, I would not try to interact with her. Not yet, anyway (three days is NOTHING, parrots timetables are much slower than ours). When an adult bird is rehomed, you need to leave them alone until they 'tell' you they are ready to take the relationship one step further because they need time to accept the new house, new routine and new human. With parrots, very little is the human's decision, it's always the parrot that sets the pace and our job is to outsmart them without them realizing it (and that is not as easy as one would think
). The thing with parrots is that they are genetically programmed to be extremely leery of strangers - it's a survival trait and there is nothing anybody can do about it so all you can do is let her take her own sweet time to make up her mind that you are good, that you can be trusted and deserving of her love (and, that's another thing, either you or your husband will be her human and the other will be, with love, work and luck, just a flock mate and nothing more).
Now, in my personal experience (three females, one male) the hens are sweet -well, sweeter than the males, that's for sure!- but they can be VERY ornery and bitey if they are overly hormonal and/or have not been treated right and yours sounds as if she is suffering from both. First thing you need to do is to put her on a 100% steady schedule with routines that repeat every day (and that means weekends, holidays, etc) because this will reassure her and reduce stress. She needs to be at a strict solar schedule with full exposure (this means, at the very least, 1.5 hours) of twilight (dawn and dusk) and should not be free-fed the protein food (this is not only unhealthy to them but it also causes aggression). A normal day should go something like this: allow bird to wake up with dawn (no artificial lights on), 1 hour after sky gets light give her fresh produce (fruit, veggie, green), 1 hour after that gets her the low protein food (like gloop, mash, chop, etc), once she finishes her breakfast, open the door to her cage and let her out on her own (do not put your hand inside the cage, they don't like this UNLESS you have their complete trust and love -which you don't and will not have for months to come). Then comes the time you should spend keeping her company to start her on her way to trusting you. You can either sit or move around in the room doing chores, watch TV, read a book, whatever but the idea is for you to keep her company for a few hours always talking, singing, whistling and, every now and then, offering her a treat (this treat should not be linked to anything, meaning it's not a reward or a bribe, it should be nothing but a token of friendship). At noon, she will rest (they all do, it's part of their daily biorhythms), and, in the afternoon, you can do the same thing -the more hours you spend with her, the faster she will accept you BUT make sure that the schedule you start today is going to be the same schedule you follow every day because although you can tweak it a bit once the bird is used to it, it's not something you can change all the time. If you need to move her (is she clipped or fully flighted?) use a stick for step up and step down and always praise, praise, praise profusely in a high voice and a singsong. Now, in the afternoon, you can either interact with her again or not. I allow my birds out of cage and one-on-one time from 6 am (when I am now opening the cages as you can already see without artificial light) to around 1 pm, then I put them back in their cage and, although I am around them until 3 or so, I don't take them out of their cages again until an hour or so before their dinner (which happens, this time of the year, at 6 pm -I turn off their lights at 5 pm but this schedule changes as the days get shorter because you need to follow the sun). I have cats that I lock in a room so the birds can be out but I have to let them out, too and that's why they go back into their cages at around 1 pm but, if you are home and have no other obligations or impediments to her been out all day long, better still!
You need to earn her trust and love before you even think of having a personal relationship with you because although senegals are smallish birds, they can be extremely aggressive and bite real hard (and I know because I still have the scars made by the male!).