I heard from a coworker this morning that another coworker (Betty) lost her young adult daughter yesterday. I believe her daughter died from an overdose, so it was unexpected. I am new to this job and don't know any of my coworkers well. Betty has been very friendly and welcoming and had shared her number and I did end up interacting with her by personal text and outside of work over a couple small things so I do know her a little and we had talked about our families over a tea. I wanted to reach out to her but I am not sure if it is better to text her or send her an email from my work account given that I don't know her that well. Also I am not sure what to say that doesn't sound like a general platitude (sorry for your loss). I don't want to ignore her loss but I don't want to seem over familiar or cross any boundaries either.
The other coworker is organzing a meal train for her (she has two other teens at home) and I will contribute to that but I feel I should also send a message.
Any suggestions?