I think I would have to see the pic to know if it would be triggering for me. But I can well imagine it would trouble many survivors, especially guys who had been abused by their mothers.
It clearly doesn't bother the woman in question, since she's using it as her wallpaper. But then, she knows the context of the pic too, whereas we don't.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)