This is a question about whether you think this pass should theoretically be forcing in a practiced expert partnership, not about whether or not you would trust your partner to "read" it this way in practice without prior discussion.
MATCHPOINTS. N/S VUL
West's 2NT was natural and invitational (but he is a PH)
If EAST passes NORTH's 3♥, should this pass be forcing on West if South passes?
Benefits include:
Plus... it's free!