Demi oMore and Ashton Kutcher are already feeling pressure on their marriage over their failure to conceive. Fourty-four-year-old Demi, who already has two daughters with ex-husband Bruce Willis, has starting making lifestyle changes to increase their chances. And she wants 29-year-old Ashton to do the same! “Demi seems very controlling,” says a close source. “She likes to tell Ashton what to do, stand here, meet this person, do that. She wears the pants in the relationship.” At a Bel Air party the lovers attended, it is said Demi was furious when Ashton accepted alcohol. “Ashton accepted a glass of champagne,” admitted a witness, “after Demi refused the offer.” But it isn’t just Demi that is feeling the stress of trying to conceive. “Ashton desperately wants a baby,” reveals the close source. “But [he] is having to cope with the possibility that Demi may never bear his child.”