Thanks all of you for your supportive messages. Sorry I've taken so long to get back - I couldn't log in for some reason this morning, so I could only read and not respond, and have been out for a wonderful hike in the hills with my family all day.
Manny has hit on the sort of things I wear this for - exactly that type of casual/ lounge wear.
Shiny - I'd love to go shopping with you!!
Isabel, Aliona and Joy - this isn't worth bothering with alterations, - I'm glad you could see what I see about the bust!
I think what gives me pause is that this is a basically shaped dress - it has bust darts and a very slight waist - but I bought a larger size because I didn't want it to be fitted for hot weather. And because of my peariness it is much baggier in the top half than the bottom and thighs - Sterling I don't thing it was so much caught on my hips as just baggy there - because I have a low slung bottom and a bit of a swayback most styles are kind of baggy at the back there.
As I have written elsewhere, I'm getting sick of the bust revealing some of my other hot weather dresses, so the higher neckline was in response to that - thanks for all the feedback on thattoo