Addiction effects everyone. Not just the user.
As you may know well being im sure it effected you too and we may not understand
People but they have their own way of dealing with things and perhapse even more so when trying to
Not get involved....to not be co dependant.
Maybe your mil also did not want to get her hopes up. Also common for families of addicts.
Congrats on your hubbys sobreity and am glad he is continuing to be dedicated to his recovery.
It is also good that you allowed his parents to heal in their own time.