1)in the will all properties owned by your aunt and uncle are mentioned .
2) will takes effect on death of testator
3)your uncle /aunt can during lifetime sell , gift the properties owned by them .
4)once property is gifted by them you are absolute owner of said property .
5) unless gift deed is challenged by your cousin and set aside by court you continue to remain absolute owner of the property
6) gifted property would not be included in case as it has been gifted during lifetime of your aunt and it supersedes provision of will