While I don't agree that Kamili is doing a great favour to Nimboli by getting married to Pushkar I think Akheraj is majorly pissed off with the groom's father's behaviour.
Pushkar and his mother are very excited about the marriage while Pushkar's father thinks he is doing a great favour to Akhiraj and his daughter by agreeing for marriage.
He has seen this discordance in their attitude towards the alliance and he plans to cash on this discordance.
He already said money is tight so he may want to get his money back from them