That scene is most interesting due to the scenes that follow it because there are scenes in eps 4 & 5 where she's going so much further than just kissing but seems to have absolutely no problem with it.
I'm not sure if DPC has forgotten about the lines of that ep 3 scene or what, because her actions in eps 4 & 5 are a very sharp contrast to her crying over a kiss. To have such an extreme reaction to that but not being in way any bothered when she's about to suck his dick is strange and hopefully there will be a good explanation for the sudden change that doesn't lead to anything too tragic, otherwise it's an inexplicable oversight to have her behave so differently.