Help please need answers fast ..?

ok cleaning MY laptop spotted my hubby signed up (again) to dating site so i set up a profile he took the bait and made no qualms bout meeting up (tomorrow nite!!) i did suggest emailing for a while but he said no wanted to meet.this happening bak in july i found out the same way and he said sorry and he was just looking etc said he didnt really know why he went on the sites..ye u heard it all b4 ..i know..but we married 20 years..meanwhile today found him listed on another dating site..wot will i do tomrw nite wen he meets me his DATE face to face.. and yes we do ave etc he never makes the move its always me ...any ideas??? guys feel free to answer need to get to bottom of this before i throw away 20 years..by the way i know he hasnt cheated on me in the past ..we are both 40..i been told i look great for 40 ..so whats happening???