In fact I pondered on the same when initially we were exposed to the plot of Babloo asking Krishna to meet up DC for interview preparation.
One plausible reason can be this.
1) For Professional Coaching centers, it is normal and acceptable to have guest faculties from real life occupations to share their experience. Then certainly Babloo's affiliation to the DC or the vice-versa is reasonable.
2) That Babloo was out of his coaching center due to the gooda caused disruption, he might have specially requested DC to allow Krishna to meet him. But that she is meeting him in office premises is way out of line from Govt permitted regulations. No one in the Govt is allowed to approve a side income business earning opportunity at Govt resources (the cabin, the chair and most importantly the DC's office hours from his schedule that he is expending on non-govt duty, also called self-serving opportunity). The DC is violating his employee conduct with the State Govt.
3) that DC is coming in his Govt Car to come to Pinky's residence is again out of line. Same as point 2, he is using state property for his personal activities.
4) if DC was coming in his own personal car to Pinky's residence, then it is not a problem.
Because of point 2 shown above, I was unhappy on that side of story where Vidya and Krishna get trapped. This is a logical flaw in the story and therefore the story seems unnecessarily dragging, forced on viewers and boring. The DC is just becoming a filler material until the actual interview whenever it is going to be scheduled. Will it be end of this month or in March ?
Edited by shridevigaddam - 11 February 2012 at 1:04pm