Speaking of the mother, she's overly emotional and self serving. Even on the stand she easily is ticked off and takes offense with comments like "you think I'm stupid". Very unwise behavior while testifying if you want to show that you're a mature rational adult. Always looking out for #1 and highly reactive. Not seeing a lot of rational behavior from her. This can't look good to a jury.
The worst thing is that all her immaturity and irrational emotive temper flaring is so wide of the point - defending herself and sometimes JC - when she should be raging for justice for her dead boy and fighting to ensure she gets free so she can see her baby again one day. Obviously she can't do any of that as she's guilty as heck.