"Between him and his wife" is correct. You wouldn't say "It's between they". You would say "It's between them". So the objective pronoun (him) is correct and not the subjective pronoun (he).
diff between official wife and unofficial wife
its romantic
They were husband and wife
the family's in between state causes a great deal of conflict between Gabriel and his wife.
Your sister and your wife are sisters-in-law to each other.
The Torah prohibits anal sex between men but permits it between a husband and wife.
cripsy
jethro
she would be your sister in law
wife & husband = family
They are brothers in law
ya mum!