well it does look odd that Avika and Avinash are playing so old character when they left BV for the same reasons because they could not play such mature character and do intimate scenes
But i think that time was different...if they would have showed Avika and Avinash doing honeymoon scenes like Shashank and Prats did it would have created great disgust to viewers as they were portrayed as innocent kids...
To be honest Avika is out of her mind to portray such mature character and even BCCC have got many complains regarding this issue and they are thinking of taking actions against such issues and now with the entry of Shiv, people would have themselves asked the PH to replace Anandi because Sid is 32 and Avika is just 15...a show, which shows how children lose their innocence and have to act like mature adults before their age and carry their responsibilities, can not go against their own principles !