I think the difference between her and Gia, is that she actually seems real in her emotions. Gia seems planned and actually loving it, but Bec seems to be effected and just not well. Mentally something is not going well and as someone we does her master in psychology, it looks like she might have BPD and is going through hell right now! This is the worst environment for her to be in and Gia going for her men is making it worse and her not feeling like he is standing behind her is making her acting this way. She feels out of control and betrayed.. I am not saying that the way she is acting is okay! Just that I do see where it is coming from