SIL is now in her 60s. She's been around nearly all my life and we have generally tolerated each other. Contact is rare as she and my DB live a long way from me.
She really picks her moments - like when my DF was dying she launched into a hissy fit about how useless my DCs were as they should be mowing DFs lawn not playing on the computer! FFS
I don't want to make friends with her; my DB won't have a word said against her; I just want some clever retort. Any ideas?