I don't know how i feel about benching him or playing him.
Benching him a few weeks while more information is gathered wouldn't be the worst idea for the team. Frankly Antonio Brown has to take some measure of responsibility for putting himself in such a stupid situation. In the best case he knew this girl was trouble and continued the relationship. I can't feel much sympathy for the team wanting to err on the side of caution for a week or two to see if anything else comes out before they play him.
On the other hand to bench him any more games will all but ensure he loses any chance to hit any of his incentives. They were hard enough with 15 games. If it becomes 13 he has no shot. To bench him simply because was he accused (with that initially looking particularly questionable) would only give fake accusers looking for a fast money grab more incentive to do so in the future. It means an accusation alone without much believably or evidence behind it is still enough to hold a barrel over a players head if they have season long incentives on the line, which a lot of them do.
Personally I find myself on the play him until proven they shouldn't side. It may well come back to bit them in the ass but you need to let these things play out in the courts. To sit him merely based on accusation (which is questionable in this case in particular) means making it only more common it happens to other player when accusers see their accusations alone can hold such leverage.