My DD has a big birthday coming up. Both grandmothers are elderly. Both were invited to come out for an Italian meal to celebrate. MIL lives an hour and a half a way and was invited over the phone as she had asked what DD was doing. SIL is bringing MIL up for the weekend. DM living locally was invited in person and didn’t say anything. I followed up with a text message the night before as she still hadn’t responded either way (she has my siblings living nearby or we could have picked her up). To receive a text back to say she wasn’t going to bother and wouldn’t spoil our meal. I knew I shouldn’t even have bothered inviting her. Ironically I think MIL was jealous that DM lived so close to the DC when they were little as she lived even further away then. But her efforts to visit and phone have paid off as strangely they are closer to her than my DM. Any advice.