what would you recommend then?in theory you can buy a Splitter, but tbh I don't think its a good idea.
isnt that a headphone/mic splitter?Well you can extend them both and try it.
It should in theory work...
Y splitter 3.5mm socket to 2x 3.5mm jacks - but these are normally not very long, so you would have to extend one of them to the other computer which would be a 3.5mm extension
https://www.amazon.co.uk/3-5mm-Stereo-Splitter-Female-Adapter-White/dp/B00OPPGX3O
Something like that will do you, 1 plug into one computer and one into the other
https://www.amazon.co.uk/Littlebush-Systems-Limited-stereo-extension/dp/B0000992SR
That plugs into the other end of the y splitter then into the other computer