I do not agree with autohide.
1st - Here Husband can prosecute the accuse under u/s 497 IPC. Which means the accuse is at the mercy of the husband. I am well aware, that the accuse will try to prove that the activity was done with the consent & connivance of the husband. But, here the defence (the accuse) is on a slippery ground based on the evidence the husband has.
2nd – The courts are well aware, that after such incidents of adultery, wife retains the tendency to file 498A & DV Act against the husband. Simply, again the burden of proof the 498A & DV lies on the prosecution/the wife.
Here again, the prosecution (the wife) is on a slippery ground.
3rd -
"wife can simply allege that husband tortured her for dowry and forced her to take these pictures with the boy with intention to sell them for profit”.
Here again wife needs to prove her allegations against the husband.
Also, the wife needs to prove that the husband concerned, given consents to it & the affair is carried out with his connivance at the time of trial of 498A & DV Act. And 498A & DV act is hard to prove in this case.
(NOTE - I was well aware of the fact at the time of giving my first reply that the wife may/will file 498A & DV act against the husband, if the husband thinks of considering any steps against the wife. But intentionally omitted that suggestion as I have given my reply based on the scenario. So, I avoided to mention the options (FALSE allegations) that are available with the wife in this situation).
4th – The wife will/may file 498A & DV act (FALSE allegations) against the husband. Then in that case, their divorce will get drag for many years, as the husband will not/should not give his consent for divorce until & unless the suit (498A & DV) gets resolved.
Which means the wife (i believe she has a sound mind) will also avoid to file these suits against the husband, if she is really willing to get marry with the accuse at the earliest.
And if the wife file one sided divorce petition, then she also needs to show the valid reason. Then the husband will contest it. This will also drag for many years.
As I earlier mentioned, the best alternative is to convince the husband for mutual divorce. In the mutual consent, the divorce will get granted in 6 months. After that the accuse & the lady can lead their conjugal life.