YES re: your response to the SC VF pic. I think C's arms are like that b/c she's deliberately trying extra hard not to wrap her arms around S, remembering their "story". Being drunk, it's hard for her & she doesn't have her usual model poise, b/c when do we ever see her stand like that?? Your "he’s behind her, facing towards her and protecting her all in one. something about his pose is very like…protective and possessive of her" also gets a YES. Because C's slightly drunk & S is protecting her.
YEP. ALL OF THIS. we rarely see drunk Caitriona and when we have, she’s usually leaning on Sam. just saying.
(^look at the pile of black next to Sam + the angle of his body. 99% sure that’s Cait’s hair right over his shoulder which means her head is on his shoulder.)