JJ on A-high flop 100NL 6 max

[jacknine]

Earlier tonight I read this post by DoomSlice where he advocates not to bet with a high pair on an A high flop ...

Later on, this hand came up:

Pdise 100NL 6 max, 4 handed.

Hero is BB J[img]/images/graemlins/heart.gif[/img]J[img]/images/graemlins/diamond.gif[/img]($96)
Villain is UTG ($93)

UTG raises $4, 2 folds, Hero raises $9, UTG calls

Pot: $20.5
Flop: A[img]/images/graemlins/diamond.gif[/img]6[img]/images/graemlins/heart.gif[/img]7[img]/images/graemlins/club.gif[/img]

Hero ...
Should bet? or shouldn´t bet? Or, should have never reraised with JJ out of position ?