Cameron Douglas’ ex-girlfriend is requesting full custody of the former couple’s two children in the wake of their purported split, RadarOnline.com can confirm. The 45-year-old is the son of famed box office star Michael Douglas, who is now married to actress Catherine Zeta Jones. The Academy award-winning actor shares son Cameron with ex-wife Diandra Luker, who he was married to from 1977 to 2000. Legal docs obtained by this outlet revealed that Viviane Thibes submitted her filing at Superior Court of Los Angeles on Monday, asking for sole legal and physical custody of the kids she shares wit…