I'm really close with one of my SILs but the other one I don't exactly like because she's caused trouble before and always has something going on but dh still has her around because she's his sister. My ds has a birthday coming up and I want to invite the sil that I'm close to, but her and sil number 2 don't get along at all. They haven't spoken politely in years and usually sil number 1 just refuses to be anywhere she knows sil number 2 will be. I'm torn now on whether to invite sil number 1 because i want to because im close to her but I don't want any fighting or nonsense (which they always have) but ds plays with sil number 2 kids better and so I think that wins over my personal feelings. I'm worried inviting both would be an absolute disaster like it was at nieces birthday party.