Dont bet 1/4 pot in a 4 way flop like that. Ur better off never betting 1/4 pot on the flop. His raise to $7 could mean so many diff things cause your $2 bet doesnt say much. As played I would 3 bet flop and hope his strong/bad enuff to get stacks in. After turn ur not making more than the $8 unless he happesn to have 22/44 or TT+ if his really bad (unlikely if no 3bet pre, but dpeends on villain). .42 AF is low, but only 78 hands. when people with .42 AF raise me and i have the nuts, i usually try to get it in ASAP cuz *most* times they are not bluffing.