Americans celebrate Mother's Day this Sunday and Lincoln Casino is marking the occasion by offering players a special gift-wrapped bonus worth a cool $440.Players making a deposit using the code LCMOM15 can look forward to a 110% bonus worth up to $440. This offer is only available until Sunday 10 May so be quick!“What Mom doesn't need a little more 'me' time?!” asked Ryan Wilson of Lincoln Casino. “So we're giving moms everywhere some extra cash to enjoy some extra slots time this weekend.”