Supervised parenting Time question

My son is going through a divorce. He has 2 children ages 10months and 2 years. I have been elected along with my wife to supervise visits between the kids and their mother. We have been elected and  have reviewed the court order. These visits are for 6 weeks then the next 6 weeks will be unsupervised. The mother has diagnosed mental issues admitted drug addictions. The last straw for my son was the night she threw the 10 moth old baby.

this leads to today. The supervised visit location per court order is to be text the day before. Upon arrival at the location which was a children’s play area. The bulletin boards stated re reservations only. The times for 9 o’clock to 1030. Another session was 1130 to 1 hour one hour cleaning times in between each session and nobody is allowed to be in the building during that time. Parenting time per court order is 10 AM to 12 noon. The mother had reservations for both times. She informed the staff member during check-in that she spoke with the manager who said she could stay in the building during her supervised visit because of her situation. The staff member called the manager who stated this was incorrect, and did not happen. Their policies are nobody in the building during these times. At that time the mother was choosing to stay for the first session and said that we would come back for the next session. As the supervisor I felt it was inappropriate to have a two-year-old and 10 month old baby to sit in the car for an hour. I expressed this to the mother, who then stated, and let’s go to another location again the kids were already wanting to play in there and felt it was again not in the best interest of the children to have to pack back up drive 20 minutes away and continue visitation then pack them back up and take them home. I felt they would fall asleep during one of those car rides and then they would be unhappy once we woke up to continue visitation I felt like as the supervisor I need to cancel visitation, however, offered to allow them to visit until we were asked to leave when the first session ended at 1030. Was I wrong?