Again, only guessing, but if AK DOES like to have all the male attention, she could have been a little resentful that RG was interested in MK (even if AK didn't even want RG, she could have been jealous. Some women are that way), and sent him over there out of spite, already of course knowing MK didn't want anything to do with him.
IF AK did this and we're just guessing, I really don't think she did it with the intention that he'd force himself and wind up murdering.
This theory, as it formulates, also clears RS of knowing who the heck RG is, because AK was the one who was seeing RG in the square. And if RS came into the house, saw RG, then RG ran out, it might stand to reason that RS and AK were seen with a knife, out on the streets.
It's POSSIBLE that one of them grabbed the knife to chase RG down. They got to the street, noticed the broken down car and people, and that might have been when AK COULD HAVE yelled at that man by the trash can.
When they couldn't catch RG, they went back in the house to deal with the truama they see with MK.
Maybe the Breakin was still real, as RG broke in the house to get to MK, but AK and RS were too traumatized to call the police right away. I have no good guess or excuse as to why not, but maybe they didn't and after waking up the next day, realized they had to do something.
This goes back to my question of RG, though, talking about how AK had slept in the house with all that blood. Why did he write that in the diary? I'm supposing maybe AK and RS could have remained in the house for a LONG time, and RG knew because he'd watchd the house. And he assumed that she'd stayed there.
THIS IS ALL GUESSING. JUST STREAM OF THOUGHT. it is not intended to be a real theory or complete theory. please do not treat it as such.