Congratulations are in order for W magazine Editor-in-Chief Stefano Tonchi and his partner, Lehmann Maupin Gallery co-founder David Maupin. We hear the couple are tying the knot on Friday in a small, private ceremony in Massachusetts in front of two witnesses, Lisa and Alexander Vreeland (Alexander is the grandson of legendary fashion editor Diana Vreeland). The two are also expected to celebrate their union with a bigger ceremony in the spring. Sources also said the couple are expanding their family — they’re expecting twins via surrogate this summer. Tonchi and Maupin have been dating for 25 years, an eternity in New York. A rep for Maupin had no comment. A spokesperson for Tonchi at W said, “We don’t comment on employees’ personal lives.”