Having a hard time being nice to another person's kid.

My wife and I really enjoy our kids and we are an affectionate family. There are other families that we know, we've gotten to know them as well. So we give hugs to those little friends and help out when they are hurt or need a hand. When we sit on the sidelines at soccer practices and games one of our little acquaintance's younger brother comes over and sits in my wife's lap and basically pesters her for attention. He slaps or pokes to get her attention and commandeers her lap away from our younger son who's 2 and half. He is kind of a twerp to our son but we try to be nice and let the kids play but it gets to be a little much for us and our youngest. Really we are there to chill and watch our eldest play. We used to enjoy sitting out watching practices and games but we've gotten to the point where we dread seeing that family as we know, no matter where we sit "HE" will find us. His mom has the pleasure of some free time chit chatting away and blissfully ignoring her offspring. We noticed he doesn't seek her out during practice. We feel for the kid but how does one tell a kid, who seems to need more attention than being given, that my wife doesn't want him crawling all over her. She has tried different ways and using a polite, but firm tone for him to give her space but he chooses to not follow her instruction. My wife home schools and the little trips out to relax and enjoy the outdoors are considered a little "me" time. So...any advice? via /r/Parenting http://ift.tt/2f9f2V3