That’s how I feel about it: I married her, not her family. Yes of course I’ll be seeing them here and there but if everybody were looking for a perfect family nobody would ever get married, right? 
I feel like you’re attacking me with your comment for no reason. I didn’t say we had a WEDDING, we had a RECEPTION DINNER FOR 25 PEOPLE, and our ceremony was at a town hall. And my sister payed for my guests including me and my wife, she payed for our dresses, invitations, accessories, the wedding cake, while my mother-in-law insisted she would pay for my wife’s guests but she didn’t after all. It’s about manners.
I’m not attacking you. But I think it’s wise to separate your anger at your wife’s family snubbing you from the idea of “gifts.”