This dream suggests that the dreamer feels a sense of guilt concerning the sister. The dream is not predicting any future event.
The meaning of the dream depends on its emotional tone (fearful, happy, sentimental, etc.) as well as the content and context of the dream. For example, a dream about watching the sister drive away in a car would be very different from a dream of baking cookies together in granma's kitchen. Very generally, the dream expresses the dreamer's own feelings; it provides no information about the sister or her feelings.
It probably means that your sister has been giving you a hard time.
Dreams are about the dreamer's own emotions, thoughts, urges, etc. So in her dream, "you" might represent your sister, and her own feeling about having a child. Or, her dream might be a metaphor showing how she feels the need for someone younger to love and care for, but tempered by her feeling unready for children of her own. There are endless possibilities, but you can be certain that your sister's dream does not mean you are pregnant. Or, if you are pregnant now, her dream does not determine the sex of your child. An Ultrasound can settle that matter.
The dream is showing you how the broken relationship with your sister is "stealing" your happiness. The image of your sister in the dream reflects yourself. In the language of dreams, you see yourself burglarizing your own valuables because of a value-less disagreement.
The dream means that your mind is trying to tell you that it is time to let go of the past and to contact your sister. This dream provides a fine excuse to open the channels of communication.
this could mean that your sister might like the same guy as well.
Sounds like you have problems.
He's doing your sister.
Shouting in a dream is pretty straight forward to interpret. This is an expression of a need to communicate anger or urgency. The fact that it is your sister in the dream does not necesarily mean you sister is angry with you. In fact it may indicate just the opposite, as it is believed that all charactures in our dreams are just aspects of ourselves. Perhaps you need to sit down with your sister and work out some old business.
it means you need better dreams and that you want to emmbarass your sister
The sister in this dream probably represents the dreamer's own self. The big dog symbolizes a threatening problem the dreamer fears.
The meaning of the dream depends on what you are doing, or where your sister is and what she is doing, and so on. The emotional tone of the dream is also important. For example, a dream of your sister angrily chasing you screaming in fear through an ice-covered forest would mean something very different from a dream of your playfully chasing your laughing sister along a sunny beach.