3.5 year old has zero interest in other classmates in preschool.

Personally, I have zero interest in this as a problem. She's has two so called friends that live next door-both girls yet 2 and 4 years older.She's social, healthy and happy at home.Not sure why wife is freaking out about this.Anyone else experience this?Thanks in advance. via /r/Parenting http://ift.tt/2h96cV3