My thought (as a woman) is to realize people generally bond with those that they enjoy shared experiences. You should go, just as she should attend things you may enjoy, whether it's biking, sports events...it doesn't have to be all-day events. I think this is so important for a relationship. It's not necessarily a jealousy thing, but while she is bonding to others and enjoying their company and she is also removed from the reality of taking care of a family and home for those few hours, just her going is intrinsically motivating.