Barbara Bush hosted a “sip-and-see” party for twin sister Jenna Bush Hager and Hager’s new daughter, Mila, on Saturday at Cole’s in the West Village. Jenna and hubby Henry introduced their firstborn, who arrived in April, to about 30 friends who nibbled on mini-lobster rolls, tuna tartare and mint chocolate ice-cream sandwiches. “Today” contributor Jenna had gone into labor three weeks early in the middle of her baby shower in April, so this bash had a wee bit less drama. Jenna had said of the spring incident: “I kind of started sweating, which I guess is a normal thing, but then, all of a sudden, in front of all of my friends, my water broke.” Proud Texan grandparents George W. and Laura did not make it to Saturday’s gathering.