Boyfriend donating to girl streamer?

my boyfriend of 6 years who I have a child with has been staying up super late and playing WoW on his pc all day and night. I found out myself that he has been often in groups with this one girl streamer, he also donated to her in her livestreams and is in her private discord group. Would you be concerned? I confronted him (because all money he uses is also earned by me, I am the sole breadwinner he doesn't work) and he said sorry and that he wasn't gonna do it anymore... It just doesn't sit right with me. She also said once that often streamers will hide their boyfriends. And he jokingly said: are you hiding something from us? I want my bits back *cry emoticon.
Bits are the currency on stream.
I mean imagine if it was your girlfriend or boyfriend doing this.
Boyfriend donating to girl streamer?
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