I couldn't agree more with recent comments. The bag with her daughters is clearly something is real sentimental value to Sarah, as gifts from loved ones usually are.
As for the "tired and emotional" speculation, don't forgot that paps will take hundreds of pictures, and find the ones that make her look worst, in keeping with the Mail's anti-York agenda. And in fact, they've failed with that 3rd one, which is quite a nice picture - I agree with other posts that the scarf looks lovely, and really suits her.
Having said all that, I still think the issue with Turkey has to be affecting her. I think that being stuck in the UK will be particularly difficult for her, as in previous years, she has usually been away on holiday in February. She usually goes skiing with the family around the time of Andrew's birthday (19 Feb) and often gets in a trip to sunnier climes just beforehand. Obviously the Princesses went skiing (and Eugenie had a trip to Mustique with Jack) and Andrew managed a bit of skiing at Davos when he went for the economic forum. So I think it must be tough on Sarah missing out this year...
(Actually, having just reread what I wrote there, it occurs to me that people may feel it’s a bit much to feel sorry for a rather privileged lady because she can’t go skiing, when there are people losing jobs etc. All I mean is that when you have anxieties on your mind – the Turkey thing – it can be a great help to get away from it all, and to Sarah’s mind, she may feel rather trapped, having been used to a life of frequent travel. But of course, there are many in worse positions!)