Baby shower

Hannah • 22 years old first baby, a girl. Shes due friday the 13th of may
So my s.o is from out of state and so is his family.we decided a while ago to do two separate showers on here and one with his family. Now that we know the gender we should be planning one , but now his mom is insisting I come up in third trimester (traveling can be a no no) and won't do it any sooner than march 20th. I don't travel much so its stressful to me and I get dressed easily with cars n being out of my comfort zone. Is it totally unreasonable to not wish to go up? I'm due in may so the two months after my shower and I dont wanna risk labor. They are mad at me for this choice and I just am frustrated with this because I don't even need a baby shower, never mind two