There's an assumption that trans folk should feel automatically safe when involved in intimate romantic relationships. That's untrue. There is actual stigma (patriarchy) that prevent what appears to be something as trivial as professing to your partner "I'm trans" to turning around and being murdered by that same person.
It's the same thing when women are raped by their husbands, family members, relatives, etc. Folk who you often feel safe/close with can be those same folk who cause you a great deal of damage.