Source: Bang Showbiz NewsDenise Richards was happy to step in to look after Charlie Sheen and Brooke Mueller's twin sons Bob and Max because they mean so much to her daughters Sam and Lola.Denise Richards will care for Charlie Sheen's sons "anytime".The 'World Is Not Enough' actress stepped in to look after three-year-old twins Bob and Max when their mother Brooke Mueller - the 'Anger Management' star's third ex-wife - checked into rehab earlier this month and says she is always happy to help.Denise - who has daughters Sam, eight, and Lola, seven, with Charlie, as well as adopted Eloise, 18 months - said: "[The twins] are back with Brooke Mueller."This is not the first time I've had all five, they're Sam and Lola's brothers. It was a full house, lots of love and life. Brooke knows anytime, and Charlie, that any time they need help with the boys, that I'm there."Denise - who was married to Charlie from 2002 to 2006 - is aware people see the set-up as "unconventional" but she would never turn her back on the little boys because of how much they mean to her daughters.She added to 'Access Hollywood': "They're our family and they're Sam and Lola's brothers and I can't imagine growing up without my sister, so anytime she needs help, I'm there for the boys."[Sam and Lola] are the best big sisters to [the boys] and they love them."I know it doesn't seem normal, but it is our normal. They're little kids and I love children, and like I said, it's our daughter's brothers, so I can't say no."