Rebekah forms a plan for

Genesis 27:6, Rebekah forms a plan for diverting the blessing from Esau to Jacob           . And Rebekah spoke to Jacob her son, saying, Behold, I heard your father speak to Esau your brother, saying, … Now therefore, my son, obey my voice according to that which I command thee. And thou shalt bring it to thy father, that he may eat, and that he may bless thee before his death…. And his mother said to him, On me be your curse, my son: only obey my voice, and go fetch me them (v.13). She was within hearing when the infirm Isaac gave his orders and communicates the news to Jacob. Her feelings prompt her to take measures, without waiting to consider whether they are justifiable or not, for securing to Jacob that blessing which she has settled in her own mind to be destined for him. She thinks it necessary to interfere that this end may not fail of being accomplished.  The plan is successful. Jacob now, without further objection, obeys his mother. She clothes him in Esau's raiment, and puts the skins of the kids on his hands and his neck (Barnes). It seems strange, nevertheless, that neither of them had any scruples at the immorality of the deed, but apparently thought that as the end was right they were justified in using falsehood and treachery (Ellicott). Upon me be thy curse: That is, I will warrant the success; or, if the issue turns out ill, I will stand between thee and all danger. This she speaks in confidence of a good result, probably through faith in God’s promises (Benson). She saith so out of an assured confidence in the Divine oracle and promise about Jacob (Gen 25:23, “the elder shall serve the younger.” Matthew Poole).      The divine oracle seemed fully persuaded her that Jacob would have the blessing, and therefore she feared no curse falling upon her or her son; and this she said to encourage Jacob (Gill).