Nina Li Rendark

Kat and Alex' single mother. 

Though she means well, she is really kind of a criminal. She was unable to get a job, still needed to live somehow and feed her twin children, so she resorted to a life of crime instead. 

Once she did something absolutely terrible by society's standards, and to avoid getting thrown into jail yet again, she just had the wildest idea, went into a museum, stole a time machine, grabbed her twins, and travelled to a distant future where nobody knows who she is and she might have a new chance.... except not. It kind of malfunctioned, and she and her children ended up in the past instead, and the time machine broke. Whoops?