Legal position of a known donor constitutes an ongoing challenge. Known donors are often willing to play a role in the child’s life. Their wishes range from scarce involvement to aspiring legal parentage. Therefore three persons may wish for parental role. This is not catered for in the current laws allowing only for two legal parents. Several studies show how lesbian mothers and a donor ’devise new definitions of parenthood’ extending ’beyond the existing normative framework’. However, the diversity in the roles of the donors suggests a split of parental rights between three persons rather than three traditional legal parents. In this article I will discuss three jurisdictions (Quebec, Sweden and the Netherlands), allowing co-mother to become legal parent other than by a step-parent adoption. I will examine whether these jurisdictions attempt to accommodate specific needs of lesbian families by splitting up parentage ’package’ between the duo-mothers and the donor.