This would be a matter of siblings intermarrying-something loveme.com that was not condemned in Scripture till the Law of Moses.
Boorama (Camuudnews.net) Warbixintan Dadii aad Daawato Waxaad ku Ogaan Doontaa Su,aalo Wali ka Dhex Guuxaya Shacabka Awdal ee ku Aadan Xukuumada Muuse biixi cabdi