OK, in the first scene of the episode "the party", BJ says Peg burnt a batch of strawberry jam. Radar and Potter respond by giving their mother/wife's address so Peggy can write to them and ask for some advice. Later, during the bug out, BJ mentions that while Radar writes his mother about the jam, he should tell her about the reunion. But, Radar isn't even writing his mother about the jam anymore because he said Peg shoould write her direct.