<p>Grandmas at weddings…so special. Clearly you do care about her and know how to help her physically. It sounds like some of the frustration here is you know her as a 3-D human being, not just a name -on-a-list. Of course you want her to have this joy if she can handle the long trip. </p>
<p>What if you asked her, “If you had a free driver-escort, would you want to go? I see it’s a five hour drive, but there are hotels nearby.”</p>
<p>Then based on her answer, you or your H could convey Grandma’s recently expressed wish to the bride’s mother, even if the RSVP card was already sent. If I were a bride’s mom and knew the groom had a Grandma somewhere, I’d be truly eager for her to attend. After all, she was invited – so she made the cut!</p>
<p>The stuff about “if you invite one uncle you have to invite them all” is irrelevant, since the uncle is only there to serve the Grandma’s physical needs, and all can understand that exception. </p>
<p>If H can’t or won’t take off work, and you can put on a happy face, you could go in his place as her helper. If she wants to attend, it’s worth your bending metal to get her there yourself. JMO. </p>
<p>You (as groom’s aunt) could skirt around your H and his brother this way: get direct permission from the groom to call up the bride’s mother. Then just discuss it with her about practicalities - no digs at the groom’s parents and such. All that only if Grandma says, this week, she’d hypothetically like to attend. </p>
<p>Or knowing the players involved, you might first sound out the bride’s mom (with groom’s go-ahead) before asking Grandma, just in case they’d disappoint her by advising you, “no room for her companion.” I can hardly imagine such a thing, however.</p>
<p>Do it soon, because these RSVP dates expire as you already know, of course. Please don’t be dissuaded if it has expired, because in actual fact the “drop deadline” from a caterer is the only real cost penalty to the hosting family to squeeze in one or two more people. Those drop-deadlines for final # plate count is generally given by caterers around a week before the wedding date when they actually buy food. Formal RSVP deadline dates run 6-8 weeks in advance for general planning purposes, but you won’t cause any inconvenience even if the RSVP date on the card expired not too long ago. </p>
<p>Also the bride’s mom needs to know about the wheelchair so she can do the seating plans thoughtfully. In fact, that piece of info needs to be discussed so you have every reason to call the bride’s mom beforehand. Perhaps from that, a larger conversation will flow. I hope for the best for your MIL and nephew.</p>