I can't see the chest on the picture you provided so I can't tell you if you have a male or a female. You could tell either by looking at the chest (long green V -almost all the way to the vent- means female, short green V means male) or by looking at the tail undercoverts (shorter feathers that reach 3/4 of the way of the long tail feathers), if they are yellow, it's a male but, if they are green, it's a female. It's easy to tell the gender with senegals because they are sexually dimorphic (meaning the males look different from the females) so, obviously, the 'trainer' you got it from is not very knowledgeable about birds. I think this 'trainer' (did the person actually called him/herself a 'trainer'?) telling you the bird was pied and only one year old was trying to make the bird more attractive to you. In any case, going by the shape the plumage is in (namely, with 'holes' where you can see the down, a clear sign of plucking), I still believe that it's not a pied gene but plucking (DNA would not show a pied gene). My male Senegal was a perfectly normal wild phenotype (it means the way they look in the wild, without any color mutation) and beautifully plumaged bird until he started plucking out of sadness from losing his second mate in just two years and, when the plucked feathers started coming back, they were all yellow, even the grey ones on his head that had been plucked by his second mate (she did that to all the birds she preened). I have seen a couple of mentions of pied senegals and I have also seen pictures of them but I have never, ever seen a single picture of a pied baby Senegal, only adults. I have seen lutino babies but not pied - and that's what makes me believe that, although I am sure that there could be a pied mutation, in most cases, it's more a matter of how the feathers grow back after plucking than a genetic mutation. But who cares? I think they are all beautiful! The only thing that determining whether it is a true pied or an ex-plucker is that it would gives a more clear indication of age - and that is also not important because adult and even old birds bond as deeply as a baby would. As a matter of fact, you are 1000 times better off with an adult than with a baby or a juvenile because parrots usually change their allegiance once they reach puberty (before puberty, they regard their human as a parent but, when they become sexually mature, they no longer want the parent but a mate) so, if it's already an adult, it is, as Forest Gump said, one less thing to worry about
It is not recommended that you put your personal email on a posting. It's not forbidden but one never knows who might be lurking out there... If you want, you can always use the PM function to reach a specific individual but, personally, I prefer people asking their questions on the public forum because lots of people feel uncomfortable posting and simply look for a previous response to a similar problem they might have. Plus, when you post it in the public forum, you get more than just one answer and that gives you a better perspective.
Now, don't worry about Joe/Jolene resenting you for been the one that took her to get her wings clipped. Parrots are very forgiving of their chosen human so, unless she doesn't choose you (which is entirely possible as we have no control over who they like and who they don't), you should not have a problem. It is possible that she decides she likes your boyfriend better (I seriously, SERIOUSLY doubt she will choose one of the kids -senegals don't have the patience this requires) but, even if she does, with patience and work, you can get her to like you and accept you as a flock member which is, pretty much, the way she will regard everybody else in the household except HER human. Zoey, my female Senegal, was given up by her previous owner because of her aggression toward his wife. They tried everything, only the wife feeding her, clipping her wings, etc but nothing worked so the wife gave him an ultimatum and actually put her up for grabs in FB. I had known this bird and the owner for years through birdsites so I flew to California to pick her up and she became my little sweetheart. I can do anything with this bird... I think I could cut off her leg without anesthesia and she would still forgive me (she is perched on my right shoulder, preening/kissing my cheek, while I type this). But it took years for her to stop attacking my husband with the consequence that he is terrified of her and either keeps to his study when she is out or walks around wearing a hoodie

So, please, please, please be VERY careful with the kids! Senegals are not known for been family pets (very, very few parrots actually are) and have real bad bites. They don't usually go for the warning nip like other parrots do, they actually bite a chunk off your flesh and are like little pitbulls, not letting go even with the blood gushing out...
The most important thing is to keep them from becoming overly hormonal or feeling that the humans are not listening to them. Parrots know what they want and are not like dogs, they are not hardwired for obedience or even subservience so outmost respect for their wishes is absolutely essential for a good relationship.