Your painting really reminded me of a section of CS Lewis' "The Great Divorce" where one character is confronted by her husband. There is imagery of a chain involved there as well - but not in the way your painting had it.
The nature of forgiveness is explored there in a fascinating way that (to me) resonates with at least my own ex and perhaps your's.
Not sure if you are interested or not, but it's an easy enough book to find online and fairly short. You may want to give it a read. It may inspire you to paint.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells