Not to be argumentative, but does it matter who wrote the text? It implies one of them was going to meet up with HF for drugs. If one of them was going, then they both were. That is, if we assume she left willingly with him. If not, then we assume HF sent it then proceeded to put the girlfriend of the guy he was hoping to meet up with in his trunk. ?
I think it would matter if we knew for sure who sent it. If it was CM then your assumption is not at all true it could have been for her if it was meth it could have been so she could get through work the next day and she could have been planing, as she told several people, to get in her car and drive home. What matters even more to me is people saying X happened when we don't know. Because as in this thread or the last one people have been suggesting that since EA texted HF (we don't know that for sure) it is proof that they had a pre existing relationship centered around drugs and it tied them together. The reality is that is a possibility but we certainly do not have any proof of that.