OMG, that’s terrible, so sorry for your loss
I see that you really care about your t and don’t want to upset her but this is your session not hers, it’s absolutely ok to bring it up and then it’s up to her how she responds and deals with this. I hope in a sensitive manner towards you, yes she has lost someone too but that should be brought to her own therapist for processing. Please take care of yourself, what a shock for you!