Just aging.  While we are aging the wrinkles tend to appear in more than just our skin.   This is to be the slowing down and enjoyment stage, earned through hard and demanding working years, but an aging parent seems to be in control of this time by manipulative demands on one of this pair. Sadness is my feeling as the presure increases by guilt and time.  Since this affects four, it need to be an open communication amongst all of us as to the best way to proceed. Without joint acceptence in this process our lives will be impacted in ways that will benefit no one, least of all the one at the center of this wrinkle.  Wrinkles need to be softened and respected so as not to irritate, but the right therapy and cream needs to be agreed upon to produced the best results.