Yes she was happy when younger and with Jack and younger children, she was also happy with Miguel in different circumstances and in a different way. I really liked the Miguel moment on the train and still can’t decide if we were seeing them as before they ever got together, I don’t actually mind not knowing, all I know it is it would have been an awful shame if her relationship with Miguel was shown as ‘inferior’ to that she had with Jack. She was 80 when she died, 32 years after Jack’s death, who’s to know when she was at her happiest, I would say she certainly got more support from Miguel, Jack was a wonderful father but at times I felt he fell under the St Jack status which so many think he was. When was she happiest .. didn’t know, I actually think it’s not particularly important to know, ultimately it transpired Rebecca was the absolute core of the show so I just enjoyed my journey via her.