My ex MIL sent card and cheque to DD, but nothing has arrived for DS
It could have been lost in post, however she also has some dementia and frequently presents get mislaid/forgotten/sent on wrong dates etc
I am not in touch with her personally, and would not want to hurt her feelings anyway
DS could ask exh to intervene but doesn't like to, and has said he will settle for nothing.
I think this is unfair and they should share it
If another cheque or present arrives at some point then they could split that, depending on what it is