We cannot accuse the Ottomans of outright duplicity, as they have been ignoring our attempts at diplomacy for centuries.
I am not sufficiently motivated to look for old communiques to see if they ever did confirm a joint invasion of Spain, as I suspect not.
However, we curse all footling nations who are seemingly content with second best.
We kill an Ottoman cavalry outside Budapest, and an English ship off their south west coast.
Our armies head east, abandoning our Spanish gains, and two of the three towns are recaptured by the Spanish.