
A bitch being in season usually excites the others. In my house they all end up playing trains/circus elephants. The worst time was when I had three bitches in season at once and they were all wearing stupid expressions and squeaking and rousting about all the time. Used to have to yell at them to pack it in and settle. I only have bitches so no actual mating could occcur, but they sre gave a good impression of the dead :D
As for the peeing I suspect it is one or both of the boys marking her as theirs. Just because they are castrated does not mean they will loose interest in sex altogether , it just usally makes them lessinterested, but a bitch in full seqason is enough provocation to ignite old memories/instinct. I suspect she is at the height of her season and things will gradually calm down again, especialy once she becomes a little more assertive that she would like the attentions to stop.
Yourt best bet is to give the others a chance to chill out by removing her to another rom for a bit when t all gets too much for you, and to avoid any spats due to the heightened excitement.
Your bitch may also be having accidents, as like in pregnancy the normal urine storage patterns seem to be upset and they find they can't hold on as they normally can, added to which in this warm weather she will be drinking more so needs to pee more often, and of course there may be some marking/advertising going on.