At a large country park today with my family. I was sat on a bench, and by the bench next to me was a baby boy of about 1 in his pram and an older child/young adult girl with him. She was holding her phone close to baby's hand so he could almost reach and as he went to she took it. Then she deliberately put it back there and made it play some noise and then took it out of his reach. He was getting upset and frustrated clearly. She kept doing this about 5x or more. Then as he was on very he of tears she it it in is reach and as he touched it she snatched it completely away. He dissolved in tears at this point(had dummy on mouth which fell out with his crying). She picked up his dummy and shoved it Hardin his mouth as he continued to cry. It was awful to watch. At this point, I didn't know if she was mum. She was physically disabled and in wheelchair. A bit later when I returned to the seat the girl was walking the baby around with him on his reins. Another older woman was asking her to be careful with him, and there were other members of the family.
I asked the older woman if the baby was her son, which he was and told her what I had seen. She said thank you and that she could be like that and wasn't suprised. I felt that if it was my baby, I'd want to know. So was I wrong to say something?