Plus we saw how she reacted when the twin started joking about Rue OD'ing. It wouldn't make sense for her to take that risk after seeing what happens first hand.
Both daughters OD'ing is too much for their mother to deal with and mucks up the story.
An athlete simping on a whore is unrealistic to you?
There's pro athletes doing that. I've seen it in college and there was a famous NFL WR who was dating a thot on my campus. I won't name him but let's say he shot himself in the foot with that decision
McKay is a sensitive dude. He's not an alpha male and college isn't working out the way he expected so he's spending time around high schoolers. He's been in love with a girl his friends tossed around so he's embarrassed to admit that.