I am very close to DBs and very different to SILs in personality but we all get on ok. I have a specific style which I wear day in day out - and have for 35 years. SIL both love shopping, especially for clothes and discuss clothes a lot, I am not involved in these discussions.
The last 3 times I have seen them together they have tried to arrange a "make over" for me. I get it, they think I wear old stuff and need some pizzazz, but it is just not my style. Also make up, which I do not and have never worn. Also, I have MS and mobility issues and what I wear works for me, I am very very busy.
I have smiled and been sort of evasive but now they are offering dates for my big "make over" and they are super excited. What can I say to firmly but politely tell them, thanks but no thanks.