I want to bring my fiancee and her kids to U.s.

Unfortunately your plan is not one that U.S.C.I.S. would approve of. I assume that your fiancée and her children are coming to the US next week as visitors, and that she is not coming as a K-1 fiancée. If you marry her within a short period of time after her arrival in the States, that might be seen as confirmation of her misrepresentation in coming to the country. As a visitor, she is supposed to have nonimmigrant intent. The better way would be to go through the proper channels of applying for a K-1 fiancée visa on form I-129F, and having her interview at the American consulate or embassy overseas so that she can properly enter as your fiancée.Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.