With autos in my expierence the bigger they become the longer they take to reach maturity, now I know their supposed to be predetermined flowering times but when I've stunted them the finish fast, or if I get a monster they will be 16weekers, I posted a pics of a 16 week somango that had 6 or 7oz on her, then I've had other somangos finish in 10week with 2oz, the 16weeker was of a similar size to yours, it swelled up at around week 12