Do I suck for prioritizing photography over my mothers attendance?

I'll try to keep this situation as concise as possible but there is a bit of backstory needed.

Our (29F & 30M) original wedding date was scheduled for the end of May at an out of state destination. Unfortunately, my future FIL was diagnosed with pancreatic cancer in Nov and it has progress terribly fast to the point that he was in at home hospice by Christmas. Even though he encouraged us to still to continue with our original plan, we decided to plan a small legal ceremony at their home on Valentine's Day weekend (next weekend) with a photographer and cake so he'd have the chance to see us legally get married at we could all have a small celebration. I invited my mom and dad (divorced), and my sister and three nephews.

Well, this past week my FIL took a turn for the worse and literally last night we decided to move the ceremony to this Saturday, so in 2 days, because we have no idea how long he will last. It was super short notice and our rings won't be finished in time but fortunately the cake will still be delivered and our photographer was able to still come.

It's important to note photography was really important to us with this legal ceremony because we have no idea how long future FIL has left and we really wanted nice photos with FIL and MIL (MIL may also miss the May wedding because she is FIL's caretaker).

My dad, sister and nephews can make the new date but my mother cannot as she will be attending and giving a speech at my godfather's funeral on the same day and the locations are 3+ hours apart.

Now I haven't had the closest relationship with my mom these past few years. I have posted stories on r/JUSTNOMIL about her narcissistic and verbally abusive tendencies towards myself and others like my sister and nephews (but also her mask slips with extended family occasionally). I have been LC with her in recent years but I did invite her to our May wedding as well as this small ceremony, and was genuinely happy for her to be there. I was sad when I realized the new date conflicted with the funeral, but I understood her having the prior obligation and made that very clear to her. To me, I'm happy to know she'll be at the wedding in May where there will more professional photography. She seemed mostly sad with a trace of annoyance that she couldn't make it.

I was speaking about the situation with a cousin I'm close to and she knows my dynamic with my mom. She asked why we couldn't do another date, and I explained the urgency due to my FIL's health and the photographer’s availability. She seemed taken aback that I was willing to continue moving forward with a date that didn't work for my mom. She claims professional photography isn't that import in the grand scheme of this situation and we could've gotten photos with a phone.

I'm wondering if my cousin has a point. I feel conflicted because I had to make quick decisions due to the urgency of the situation, and while I didn’t intend to exclude my mom, I wonder if our strained relationship made me prioritize other factors, like the photographer, without considering her.

Am I in the wrong here?