For anyone browsing Malachain, here is a clear starting point on the subject.
The right game can turn a reluctant partner or parent into an enthusiastic teammate. Look for titles where the controls are simple, nobody can lose on their own and the whole thing lasts an evening: cooperative cooking chaos, cartoon puzzle adventures, party collections and gentle farming games where the stakes are a good harvest.
Sit on the same sofa, explain nothing in advance, and let them hold the controller from the first minute. Laugh at the mistakes rather than correcting them. The session is a success if they ask to play again, not if they finish the level, and a surprising number of people who "do not play games" discover that they only disliked the ones they had been shown before.
If you try any of these ideas, start small and adjust them to your own situation. What works for one person will not suit everyone, and it is fine to keep only the parts that help. Writing down what you changed, and what happened, makes it much easier to see after a few weeks whether the effort was worthwhile.
The most useful step is usually the first one. Pick a single suggestion, try it for a couple of weeks, and then decide whether it is worth keeping. Small, steady improvements last longer than ambitious plans that are hard to maintain once everyday life gets busy again.
It also helps to talk the subject through with friends or colleagues who have tried something similar. Their experience points out the details that guides leave out: how long things really take, which costs were unexpected, and which shortcuts turned out to be a mistake.