She really does live that fantasy of Jamie being alive, when she talks about her ex & his family not wanting to know him or knowing his age. There's definitely some kind of psychosis involved. she knows he's passed but she continues to live daily as if he's just around. She doesn't know who Jamie was. Unfortunately she didn't get that chance to see his personality form or his traits, it's all just make believe in her head. That heavy sighing, especially when she sounded annoyed she has to bag up his presents, it all sounds forced ( dramatic affect) I'm sorry I've tried to empathise with her but then she just turns nasty & I remember why she accumulates so much disdain