no advice other then to mention i sort of know how you feel with your Mum's comment cause when i was pregnant with my DD she would say " I reckon it's pay back for you now as i was in labour with you for 36hours "

i tried to find the humour in it but it did cause me some anxiety ... and needless to say my labour was for only 2.5hrs so goes to show such unneccessary wishful thinking on our Mother's behalf

(my DD sounds like your 1st bub too and i would have the same thing cross my mind with a 2nd bub, i think it's just natural)