I found some pictures on my FIL's computer and brought them home to do this fun experiment. I think my husband has always held some slight disappointment that our kids didn't look more like him. My dtr has always favored me more both in my childhood pics and now. Sorry, I don't have any of my old pictures on computer yet to show you. In fact, when we first saw her with the sonogram, the technician (who I adore) made the comment that she definitely had my chin! What chin?! Indeed, they both do! In most pictures and when you see them in person, it is easy to tell they are siblings and their resemblance to me.
Thankfully, there are some pictures to prove that at least my son belongs to him!
(YES, they BOTH belong to him!)