If Cassidy got the status girlfriend/slave or mistress she counts against Emma's judgement, you can't friendzone or breakup with her, because the nobreakup flag is set for her by default.
Pregnancies count also for the judgement. (Be aware that if Bree is pregnant and her lesbian points are equal/above 45% during the event where you eavesdrop on her and Emma in the uni, you can gain a lovepoint there)
Only girls which are currently pregnant or count as a girlfriend (got one of those statuses: "girlfriend", "fiance", "mistress", "pet", "sex slave") should influence the judgement...