misfitmel,
The way I, and I must say this is only my thoughts would play it .
I would explain that my absence from you "mum" and home has caused me to be a little bit spiritually low, therefor it might be good for me, now I am back, to have a top up, "Scriptural Top up by way of a bible study with you mum present and an elder taking it.
Then through the course of the study you can have a field day asking all the relevant points and queries you have, without getting yourself at loggerheads with your mum, this will allow mum to see things she may not know anything about, it will also let the elder show whether he will lie his way out of questions, your mum might just see him squirm !!
Whatever way you go good luck to you,
Now that’s something we couldn’t say when in the Org.
KT