While Ashlee Simpson-Wentz spent New Year’s Eve in the Big Apple with baby boy Bronx, her hus band, Pete Wentz, was partying at club Jet in Vegas. However, a source assured us, “Pete seemed preoccupied the whole night. Beautiful girls kept trying to talk to him, but he wouldn’t even glance their way. Ashlee should be proud to ring in 2010 with such a faithful husband.” Another partygoer said, “Wentz was giving shout-outs just before the count down, wishing his ‘Baby mama back home taking care of the kid a Happy New Year!’ Ashlee, who’s starring in “Chicago” on Broadway, was kept company by her sis ter, Jessica.