Do you view her as dead or as having passed on into the spirit world? Perhaps she is trying to remind you that she is really still "alive" in the sense that only her body, like cast off clothing, is "dead" but that the essence of what she truly is, is still "alive". I used to have similar dreams about my dad, and still do, tho much less often.

HI! In my personal opinion parents in a metaphorical way never die parts of them genetically or psicologically remain in us till life. I sometimes in some atitudes I have can see my mopther in me,others my father. There is a book "My mother myself" That explains that perfectly. Probably in a particular situation you are living you acting like your mom. Check that attitude if you like it or not. You can change it if it is not working.

Just my sense of it.