Tough decision! Help please!

Sara • Married to my highschool sweetheart. SAHM of 3 wildflowers. baby #4 making their debut 2024
Okay me and my husband still have not found out the sex of our little one. He really wants to go to baby belly spa and find out this monday; but his mother is throwing us a gender reveal party on October 10th. I planned on waiting until then to find out with the whole family but he is dying to find out now! Do you think it is better to find out as husband and wife or as an entire family?