Here is the solution - instead of telling the police anything, tell Avdesh that they have a deal: since they are all new to this place and presumably don't own a home, work it out this way. Avdesh can have Pihu in his home, but only if Mama, Mami & Pawan are allowed to move in and live there as well. 😈 In other words, they won't recognize that place as Pihu's sasural, but just go w/ the solution where she is safe, and treat it like her maayka.
Avi will be somewhat happy since Pihu would now be living in his home, but not w/ him (@ any rate, he still has his brahmachari vow) while Mama and Mami won't be giving Pihu away in marriage to a gunda, but just moving into his pad. In the meantime, Avdesh can scare anyone who responds to Mami's ads for Pihu's rishtas. 😈 Only person pissed about such a deal might be BJ, but Avdesh is the one who makes the rules.
How about it, Mamaji, Mamiji & Bhaiyaji?