Guilty !

Today we were supposed to gather for a lunch buffet @ "Not just Jazz, By the bay", a treat by PSR on his b'day. The place is close to my office and since PSR didn't attend the intern, I had the responsibility of getting the tables booked for all of us in such a busy restaurant. We usually take an hour and a half or so to have our lunch cuz we kinda enjoy exploring new places which serve good food. I planned to leave the office by 1 P.M. but my "I can't say NO" attitude made be do so around 12 P.M. on the host's humble request :P
Now the question arises, what would i say to my mentor for leaving so early for the lunch and staying there for more than 3-4 hours. However I am good at handling these kind of situation but this time I seriously didn't have any idea what to do !! Finally Aarathi cracked one. Though it was tough to tell my mentor that its my B'day today !! I planned it well and unfortunately I didn't realize that what I was wearing was "Dhin Chaak"and not formals which made him strongly believe that its my B'day! :D I told him its my b'day today and I am giving a treat to my friends at a nearby place and thats why i need to reach early and it will take "a bit long" today to have my lunch. I doubt he would be thinking as if we take optimum time generally ! He joyfully wished me. Followed by this, to be in a better position, I added that I'll be working late around 7 just to compensate today's loss :D. He being very nice to me, allowed me to go and have fun !
I seriously am guilty of lying to him. I am misusing his cool nature and it made me so very uncomfortable. Though it took me a long time to finally execute this idea cuz i didn't want to lie. Sorry sir !! and ya one more thing.....the tr8 was awesumly awesum !!