All lovers are in pairs, and all pairs are the same alignment (one pair of mafia lovers, four pairs of town lovers). So town pairs are also masons.
Nightless.
If the mafia lovers are lynched, they have an opportunity to win the game if they can accurately name
EV:
Assume that town never claims any lover pairs, because it's sort of strictly bad for them to from an EV perspective. An accurately-claimed lover pair might as well already be lynched.
There are 3 possible ways for 4 townies to be paired up, 3*5 ways for 6 townies, and 3*5*7 ways for 8 townies. Assume mafia guesses randomly among these options.
Then EV for mafia (a bit easier to calculate) is:
(1/5) * (1 / (3 * 5 * 7)) + (4/5) * ( (1/4) * (1 / (3 * 5)) + (3/4) * ( (1/3) * (1/3) + (2/3) ) )
≈.48. So town EV is ~.52.
Interestingly, of that 0.48 EV, 0.4 of it comes from the mafia getting 3 mislynches! So only ~8% of the time will mafia actually win off of figuring out the lovers... assuming random choices, which is probably pretty far-flung from reality. In reality, the merlin-inspired mafia last chance means that the town has a significant burden to obfuscate things.