When does OBS end?

[DaveASA/FED]

Ok been kicking something around in my head. here is the play
R1 on first, B2 hits a triple to the fence but gets tripped by F3 and falls hard, R1 stops to look at teammate and slows down when ball gets in there is a close play at 2nd on B2 but you signal safe, as the play is going on R1 has now broke for home and there is a throw to the plate to make a play on her, B2 now tries for 3rd and is tagged out by less than a step.....so what do you do???

I am thinking that it would be a dead ball and award the runner 3rd since, as I mentioned above IMJ it was a triple when it was hit with no OBS....and I would not kill the play at 2nd since she was safe....

BUT the only thing I have to say is it looks awful thinking through how that would have to look on the field. Girl barely safe at 2nd then on a continuing play you still give her 3rd. My answer is, if she was on 2nd after the ball was dead I was going to give her 3rd anyway.....

Just kicking that around in my head, thought I would bring you all into my warped discussion..... so what say you all???