Sarindi landed back at Slimbridge Wetland Centre, in Gloucestershire, with Sarind.
Swans mate for life but last winter Sarindi and Saruni shocked experts by returning to the centre with new partners.
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The wild Bewick's swans had been together for two years but failed to have any offspring so experts at the centre believed this may have been a possible reason for the split.
They wasted no time finding new mates and acted indifferently towards their former partners on the lake.
Julia Newth, wildlife health research officer, said: "Fortunately for Sarindi's second mate Sarind, a second divorce does not look on the cards yet and both are happily settling in for their second winter together.
"Perhaps they are learning some lessons from recent arrivals Teapot and Teabag, who have faithfully been together for 15 years."
