Well this all started because......
You all did not figure out a way to pick up this certified letter. Actually your husband did not pick up HIS certified letter.
Take ownership of this and just have husband inform her that HE just forgot. It is the truth. He does not have anything to hide..they either believe him or that don't. No hidden agendas.
They want a fight. They live for this stuff..
Instead stay above it and act extra civilized by behaving maturely.
Do not et them know you all are angry. Instead treat them as though they are obviously confused.
Husband could say.
I am sorry for the confusion. I have been so busy working, I just kept meaning to go to the pst office, but it opens and closes while I am at wrk.
I can tell you all have assumed the worst, but honestly we are fine, just super busy.
Ignore their crazy behaviors as though you did not notice.. Stay out of the drama... Ignore it.. I promise it will so baffle them... They will not know what to do.. And you all come off as gracious and stable.
I have and do live this life.. I have these people on my life. I have learned that indifference is a great way to drive people the most crazy....
But make me seem/feel in control.