I don't find the arti offensive but then I'm not religious I only believe in doing good by my fellow beings. In Prerna's defense, she has made is very clear to Bajaj that her heart beats only for anurag - her marriage to b is no ordinary marriage - he knows it was only a deal - she is NOT obligated to perform any ritual with him.. She has told him loud and clear than she can never stop loving anurag - so it's totally her choice whom she does the Pooja with..had this been a regular marriage, then perhaps it's odd.. but even in that situation if her heart wants to do the arti with anurag and she does it and if Bajaj has issues with that he can divorce her.. It's not like she's doing anything with anurag behind his back :)