GAG,
The person who sent that to you is obviously a coward.
There is much written that the person that gets involved
with a MLC'r has issues of their own that they can not deal with.
The OP in my sitch is also a coward. BIL has said it. W has admitted it. Does not change the fog. You must be a threat to this
coward for them to go to this trouble like Mila suggested.
Whatever you are saying/doing to get this type of package in the mail, suggests to me you are doing something right.