Ans9: (đđđnobody understood the Q. except one person.. if u revisit the Q. u ll realize that i was actually asking why was Daya Sir dining/meeting with that lady?.. n GD guessed it rightđ)
we see Daya Sir receiving some pics of galz (to be considered for marriage) by post from her sis in KILLER IN THE JUNGLE (14th Jul 2006) n he starts meeting em (as per his statement) followed by THE CASE OF THE MYSTERIOUS GIFT (21st Jul 2006) in which he's shown at such proposal meeting itself.
Sorry @mano...its just ur assumption about the scene while its not mentioned anywhere...may be she is Daya sir's just a friend...đ