FABruary Style Challenge - Sheer folly

I'm one day late, because of internet connection problems in our hotel, however this was a post I didn't expect to make.  The Style Challenge was "sheer", which didn't sound like a good idea for an over 60.  I guess it depends on how you define sheer, as if you have any wobbly bits (which, to be honest, most over 60s have) you don't want to expose them by wearing a sheer top.  If however the top is lacy or patterned and the wobbly bits are safe from critical eyes, then why not wear it?

Having been reassured by reading Imogen's own post, I happened to wander into a fashion shop and spotted a suitable top.  I obviously needed to wear something underneath, and this white and grey t-shirt wasn't necessarily the ideal choice, but it was one of the few items of clothing I had packed that I thought would go well with my new top.  I don't think that it looks as good as it would with the right top and bottoms, especially not with dark coloured trousers. What do you think?  Is this sheer foolishness or is it appropriate wear for a woman of a certain age?

Sheer folly?