Legality of Pop-Up Slide

[Manny A]

FED game. R1 and R2 on second and first. Defense tries to execute a 6-4-3 double play. The throw from F4 bounces to first base, and the BR easily beats it.

Offensive head coach requests Time and goes over to my partner on the bases. I'm not sure what prompted the discussion, but as the coach trots back to the dugout, he looks my way and asks me, "Didn't you see the runner pop up after her slide and bump my second baseman?" I honestly didn't see it since I had glanced at third to see R1's touch of the bag, just in case she tried to score on the play. I asked my partner later in the game between innings, and he said he didn't see anything wrong with the play at second.

I went into the rule book after the game, and checked the definition of slide and illegal slide in 2-52. I didn't see anything that said a pop-up slide was illegal. The closest is 2-52c, where it says a runner cannot go beyond the base and make contact with the fielder. But this runner never went "beyond the base".

So, should R1 have been ruled out for what R2 did here? Or was this perfectly legal? And how does it apply to other rule sets (ASA and NCAA)?