Husband kissed neighbor

Ok so I took our 14 and 9 year olds to the movies the other night while my husband stayed home with our 4 year old son. So my husband was doing some yard work like trimming the limbs on the trees and my son was outside playing. My husband then told me that The neighbor which is around in her mid/late 50’s (my husband is 36) came over to help watch my son while he cute the limbs. I get home and the first thing my 4 year old ran up to me and said, Daddy kissed the neighbor! I looked at my husband like wtf?! He laughed and said really? I asked well did you? He said well of course not. So why would my son make that up?! What do y’all think? She’s always waving at him and saying hey to my husband. Never even acknowledges that I’m around or even says hi.