When to use "sin/sina" vs "hans/hennes/deras"?
Basically, the title. I'm just curious if you want to say, for example, "A dad and his son". You could say "En pappa och hans son", but is saying "En pappa och sin son" incorrect? Likewise, you could say "Mannen läser sin bok", but is "Mannen laser hans bok" incorrect.
I guess I'm just curious what the rules around this is. Tack så mycket.