Married couple, early 40s.

Started out as an open relationship 7 years ago which transitioned to poly this year. The "open" however was mostly in theory due to COVID, work, time constraints etc

I have taken to polyamory well and can see myself choosing this for the rest of my life but my wife would prefer to return to monogamy. I have another partner at this point so closing is not an option for me so she said that she would like to keep trying to make it work (she hasn't managed to find anyone that she wants a relationship with and has only had a couple of short term flings).

I don't like that she is only doing this for me, and this situation is making me uneasy. I want to respect my wife's decision with wanting to continue and not make a decision for her, but I can tell how hard she is finding this and worry that this will only get worse and it would be kinder to part ways now.

At what point is enough enough?