Which Visas Office did you apply to or pass your interview?
Honestly if your age difference is 20 years(or maybe I didn't read correctly), that would be too much and your chance to get the visas is very little.hower you can always appeal if you feel your relationships is genuine.though smiling might be a good sign, because some VO are not nice in interview, however it is not a guaranty, it might be simply because you were dealing with professional people.moreover you were lucky to have been interviewed by 2 people since this most of the times reduce the personal jugements.
Most of teh time V officers give the answer in place.m not sure but maybe they are going through the 150 pages you provided to see if you gave relevant information there. what does your Ecas show? no decision made yet?
In my conclusion I can tell you to hope for the best but be prepared for the worst.May God bless you and all of us!