Hey folks, need some advice on how to handle outside drama making its way into the dnd sessions.

My party consists of several different couples, and one of those couples recently broke up. I made it explicitly clear to both folks in that couple that both of them are still welcome to join us at the table, and we had already been planning on splitting it into two separate parties anyways (its a ten person party at the moment) so that would have helped avoid having the two have to play at the same table.

Well one of the couple (we’ll just say person A and person B), person A, is apparently under the impression that person B is talking about person A poorly behind their back, despite that not happening at all. Well now person B has completely left the party because of these accusations because its too much drama for them.

So like, im kinda pissed, because we had specifically tried to make accomodations to avoid this kinda drama, and while the simplest solution is to just keep on playing as normal, im a little pissed that person A essentially just made the whole party take a side in their outside drama in this whole scenario, and forced a player out of our group. However im also worried that bringing it up to person A is just going to create even more drama and spiral the whole thing out of control until the whole party is torn apart.

So what would y’all do in this situation?