[NoExtinction]

Pretty dangerous situation..
If he does have a flush, perhaps your bet is too small. If you put him on a lower H than K or Q (as you did), then I think you should bet bigger (maybe 24-30) to get him to fold ~ whatever might not look too suspcicious to how your friend plays. Only you would know where that threshold is. Half pot on the riv might not look to suspicious but scare your friend knowing he will only have 20t afterwards if he loses


If he is a crafty player and capable of giving you rope to hang yourself, just check the riv

for $ HU games, i would check this river