Seems like the chain of events was:

1. sohkamyung shared article on mastodon
2. You saw the article on mastodon and shared over here
3. Weecious commented here
4. Weecious’s reply appears on my mastodon since I’m subscribed to the channel over there
5. I boosted her reply on mastodon
6. sohkamyung saw it and responded on mastodon

That’s the magic of the fediverse hahaha