I'm not sure specifically what this story is about without more context. It could potentially be a very serious and inappropriate situation if taken literally, but it might also be a figure of speech in some strange or miscommunicated story.
It could mean that a man entered the club where his wife was. For example, he was looking for her in the club and finally 'came inside' the club where she was.
This situation involves serious ethical violations. In a committed relationship, fidelity and respect are fundamental. Allowing a friend to engage in such an act violates the trust and boundaries within a marriage. It goes against the commonly accepted values of monogamy and the respect for one's partner.
One possible interpretation could be that in a story, a male character entered a place where the speaker's wife was located. For example, he came inside the house where the wife was.
Perhaps my friend comes inside and my wife is reading a book. She puts the book aside and says hello. They could then move to the sofa and start chatting. My friend might ask my wife about how she's been lately. She could reply about her work or some new recipe she's tried. And then they could continue the conversation with my friend sharing some of his own experiences from work or his recent travels.
It could be a story about how your big brother entered your life in a significant way. Maybe he moved into your room when you were young, and from that moment, he became a constant presence, sharing his experiences, protecting you, and creating memories together.
One possibility is that it's about sharing a secret place. Your big brother found a cool hiding spot, like a small attic in your old house, and he brought you inside. You both made it your own little world, filled with treasures you collected and stories you told each other.