Ive had a few dreams of my partners sister being pregnant she is just walking round in my dreams heavily pregnant.
does this have any meaning?

Bec

It's possible that in the dream, she represents herself or she represents a quality in yourself that you associate with her.

Has she talked about getting pregnant or do you suspect that she might be pregnant?

Pregnancy in a dream can represent potential or something new that is happening in her life or in your life.