, 62, was also left the couple's jointly-owned properties including Prebendal House in Thame, Oxfordshire and a home in Kensington, west London as well as money in their joint bank accounts.
, a druid priestess, has been backed by family members as she battles to release her late husband's assets, the source added.
admitted: "Creative, artistic people live in a different way, maybe.
, 61, says Robin even helped her with Last Confessions of a Scallywag.
said that the late singer cried when he wrote the song and this fragment of song was moving, reflective, gorgeous and incomplete.
On unveiling the stamps, his wife Dwina
described the moment as "deeply moving and fantastic - I love the stamps', indeed everyone present felt the family's overwhelming emotion.
RJ, the only child Robin and Dwina
had together, said his dad was "a brilliant light and a true inspiration".
Gibb is survived by his second wife, Dwina
, and four children, as well as his older brother, fellow Bee Gee Barry Gibb,
Robin's wife, Dwina
and son, Robin-John, his son Spencer and daughter Melissa have been at his bedside every day, talking to him and playing his favourite music to him.
Gibb's relatives have said they have been singing to him while in hospital, with wife Dwina
revealing he had cried when she played him the song Crying by Roy Orbison.
His brother and bandmate Barry even sang to the former chart star when he visited him in hospital in London, according to Robin's wife, Dwina
They are understood to include his wife Dwina
, brother Barry, 65, daughter Melissa, 37, and sons Spencer, 39, and Robin-John, 29.