From wikipedia: "A suggestion of death, in law, refers to calling the death of a party to the attention of a court and making it a matter of record, as a step in the revival of an action abated by the death of a party."
Since custody involves TS's & MS's children and TS is the only deceased party, it appears that MG is bringing TS's death to the attention of the court in this manner, and someone may be presenting TS's interest in the custody of her children. Just guessing.
Since custody involves TS's & MS's children and TS is the only deceased party, it appears that MG is bringing TS's death to the attention of the court in this manner, and someone may be presenting TS's interest in the custody of her children. Just guessing.