The goal of this study is to evaluate the effectiveness of an individualized treatment trajectory in which the order of trauma therapy for the parent (Eye movement desensitization and reprocessing (EMDR) therapy), trauma therapy for the child (EMDR therapy) and attachment-based therapy (Dutch short-term intervention for atypical parenting behavior (NIKA)) is tailored towards the complex needs of victimized parents and their young children (4-6 y/o) after domestic violence. The treatment trajectory is based on a guidance document that supports therapists to determine the optimal order of interventions based on a standardized set of factors. The primary goals of this study are: 1. To examine how post-traumatic stress disorder (PTSD)-symptoms of parent and child and parental sensitive and disruptive parenting behavior develop and interact over time, while they follow the individualized treatment trajectory. 2. To test whether the start of the treatment trajectory (e.g. the phase in which parents can receive NIKA and EMDR therapy and their child can receive EMDR therapy) leads to a decrease in disruptive parenting behavior towards the child, an increase in sensitive parenting behavior towards the child, and a decrease in PTSD symptoms of the parent in comparison to the baseline phase. 3. To test whether the start of the treatment trajectory (e.g. the phase in which children can receive EMDR therapy and their parent can receive NIKA and EMDR therapy) leads to a decrease in PTSD symptoms of the child in comparison to the baseline phase.