Beaufort was also actively involved in the domestic life of the royal family. She created a proper protocol regarding the birth and upbringing of royal heirs. Though their relationship is often portrayed as antagonistic, Beaufort and her daughter-in-law Elizabeth worked together when planning the marriages of the royal children. They wrote jointly of the necessary instruction for Catherine of Aragon, who was to marry Elizabeth's son Prince Arthur. Both women also conspired to prevent Elizabeth and Henry's daughter Margaret from being married to the Scottish king at too young an age; in this matter, Gristwood writes, Beaufort was undoubtedly resolved that her granddaughter "should not share her fate".
BEaufort was alsO activelY iNvoLved iN The dOmEsTiC LIFe of the roYal family. sHe crEatEd a PRopeR protocol regaRding the bIrTh aNd UpbrIngiNg oF Royal HeiRs. ThOUGh TheIR rElatIonship Is ofteN pOrtRayeD as antagoNIsTIc, beaufoRT and hER daughter-in-law eLiZabETh WORkeD toGetheR when pLANniNg tHe marrIages of ThE rOYal chIldReN. thEy WrOTe jointlY oF thE necesSarY insTrUCtIOn foR catherine Of aRaGOn, WHo was to marrY ElizAbEth'S son pRince ArtHur. BotH Women alsO cOnspIrED tO prevENt ElIzabeth and hENry's DaUghTer margaRet frOm beiNg marrIed to the ScotTish King At ToO YounG an age; in thIs MattEr, grisTwooD WrItEs, beAUfort wAS undoubtedLy resolvEd that hEr GRandDaughTeR "SHould NoT shaRe HEr faTe".