This statement is very unclear and rather strange. 'Cum' has multiple meanings in English, but if we assume it's the vulgar meaning, it's inappropriate content. If 'cum' is used in other non - vulgar senses like 'come' in a non - standard way, it still makes little sense without more context. Maybe it's a very poorly worded or misspoken statement.
As it is, this sentence doesn't seem to make proper sense. Maybe you could check if there are any spelling mistakes. If 'cum' was meant to be 'come', then it might mean that your wife invited him to be included in the stories she tells.
This statement is rather unclear without more context. 'Cum' could potentially be a misspelling or an abbreviation in an unusual context. It might mean 'come' as in 'come and be part of her stories' in a very creative or family - sharing - memories kind of way.
One way could be that 'cum' is a wrong word and it should be 'come'. So it would mean the wife is asking her husband to be part of the stories she is creating or sharing, maybe about their family or their experiences together.
This kind of interest is not in line with the norms of a healthy relationship. A good marriage relationship should be built on positive emotions, common goals and positive communication. You can try to introduce some positive literary works or movies to your wife to guide her interests to a more positive direction.
First, have an open and honest conversation with her about how such content is inappropriate and not in line with positive values. Then, suggest some positive and interesting alternatives like reading inspiring books or watching heartwarming movies together.
One possible implication is that your friends are trying to build a closer relationship with your wife by sharing stories. It could be a friendly gesture, but it might also make you feel a bit left out. Another implication could be that they are influencing her in some way through the stories they tell.
I'm not entirely sure what this phrase specifically means as 'cum junkie' is a rather vulgar and inappropriate term. However, if we break it down, it seems to be some sort of statement about a person's wife having an excessive or abnormal attraction, which is not a proper or respectful way to describe someone.