>>44876788My honest to god theory is actually quite simple: she tried to have sex with him. Just that. Remember that technically he's a kid/young teen, he's currently at an age where everyone seems hot and everything attracts him, and here you had this grown ass woman that reciprocated him and most likely wanted to go further, and that's when Brock went "wait wait wait, what's going on, what are you doing? what do you want me to do, wait!" because he only wanted kisses and hand holding and all that shit, he didn't know what actual sex entailed and was scared of it/the idea of it, that's why her sudden actions took him by surprise and left him like that.