Very strange indeed but I've heard of similar and had "things" happen that aren't dreams but simultaneous...well I don't know what you'd call them.. feelings? I don't know why they happen except to say that I feel at certain times in waking or in dreams that people do "tune in" with one another, not something we can control or manipulate... and when the time is right this happens. I can only assume that there is a link between the persons (as you and your mother) and when it happened to me, me and OH. Mine was...all day one day I had a feeling I had a ring on my wedding ring finger (altho married I don't wear any rings indoors so didn't have one on). It was really niggly....I kept wanting to take it off, it was definitely "there" this ring as in felt it but didn't see it, it was so bothersome. In the evening after our meal my OH said that he had been really bothered by the feeling of a ring on his wedding ring finger (which he didn't wear) and that it lasted all day and he was aware of this "ring". I was absolutely gobsmacked because I'd not mentioned anything to him and to find he'd experienced exactly the same on the same day and over the same hours was really freaky. Needless to say I didn't have an explanation and never did know why it happened... no hidden messages there... we didn't get a divorce ha ha.