C.D. is a 22-year-old primipara at 6 days postpartum coming…

C.D. is a 22-year-old primipara at 6 days postpartum coming to see you in clinic for “pain in her stitches.” She had a healthy pregnancy and delivered vaginally after a 24 hour labor. Her labor was complicated by chorioamnionitis and she and baby were treated according to current guidelines. On exam you note her 2nd degree laceration repair has partially broken down. Which of the following is the most likely contributing factor?