Advice on colleagues having affair - one in abusive marriage - how do I keep out

Hi, this is both simple and difficult... I am a involved in a voluntary first aid group, and one of the other newer members has confided in me her husband is abusive and things proceeding courtswise on that front. She has also said a more experienced male member of the group has been showing... affections (details not known on communications, don't want to know). As a side note, I am bisexual, but more attracted to other men as a rule. In last few days, hace been messaged online to say things happened with Member X, and mother having cancer. Also risque joke was made to me which I have gently poured water on earlier. I am aware I do not know the whole story on what is going on on several fronts, and am determined to back myself off as subtly as possible, however, I am aware that there is a potential "angry husband" who I met with this lady as they were shopping once, who could show up at a first aid duty and pose a risk to other group members. I am assuming that staying a bit reserved for now and hoping whatever is going on will settle. I am just a bit shaken by the last couple of twists and thinking a bit of subtle distance to protect myself is wisest....

Sorry for asking, but this, and the order it took, slapped me between the eyes: "As a side note, I am bisexual, but more attracted to other men as a rule." What can your own sexual preferences have even remotely to do with what's happening between these two/three people?

Order could have been made better, I admit, it was in relation to me feeling some comments on one occasion were... risque and maybe a little probing in my direction and needed water poured on.....

Okay, thanks for clearing that up. So what exactly is your dilemma? Are you saying you could somehow just sense when you met this angry man that he was the volatile and possessive as well as violent type, and is why you suspect if he got wind of the dalliance between his ex2b and male colleague he might well turn up at whatever venue and potentially start an indiscriminately injurious scene? And that this is why you wish to disassociate yourself from the pair, so as not to be included as a target?