ANSWER: Bill's intention was to give his son twice as much as his wife. He wanted to give his wife three times as much as his daughter.

Daughter's Share: D
Son's Share: S = 2W = 6D
Wife's Share: W = 3D

Estate = Wife's + Son's + Daughter's
Estate = 3D + 6D + D
Estate = 10D

Daughter's share = 1/10 of Estate
Wife's share = 3/10 of Estate
Son's share = 6/10 of Estate