…This dream usually has different meanings depending on with whom you sleep. Dreaming that you sleep with a person of the opposite sex can mean an obstacle to achieve you goals. If you dream that you sleep with someone of the same sex, it may indicate setbacks. If you sleep with an ugly man, it indicates disease; if on the other hand, you sleep with a handsome man, it indicates disappointment. Sleeping with an ugly woman means death, but sleeping with a beautiful woman indicates betrayal. Sleeping with a former spouse indicates bad news, but sleeping with your current wife or husband indicates joy. Sleeping with your mother indicates security in business. Having sex with your own daughter means scandal, and if you dream you sleep with your sister, it can indicate a close trip. Dreaming that you have sex with prostitute portends permanent fortune….
Dream dictionary: sex by mother or sister dream meanings
To dream that you sleep with a person of the opposite sex, signifies hindrance in your projects; with a person of the same sex, perplexing events. If a man sleep with an ugly woman, it means mischief to himself; with a melancholy-looking woman, dangerous sickness; with a handsome woman, treachery. For a woman to sleep with her absent husband, it denotes bad news. To sleep with your wife, pleasure; with your mother, good business; with you daughter, scandal; with your sister, departure; with a fashionable woman, success.