Mrs. Allen is the mother of Brooke Allen, a student under music instructor Jackie Walker, who divorced from Brooke's father Steven with false allegations against him so the final legal settlements would go in her favor. Brooke learned from this to set up Jackie Walker for child sexual abuse, working with her friend Rachel Burns and recruiting their little brothers make the false accusations against Walker with the girls' coaching.
Brooke and Rachel took guilty pleas of probation once found out, with Mrs. Allen never being charged even for reckless endangerment. (SVU: "Dissonant Voices")