The fic I read was a T'Challa/Tony fic. I think it was a slow build relationship. Towards the end Tony goes to Wakanda for a long visit? T'Challa busy with his various duties isn't able to greet Tony when he arrives. He returns to the palace (home?) to find that Tony was shown to his room to rest? I think T'Challa's mother and sister approve of Tony being with T'Challa. I think there were gifts they have each other.
I think it was on AO3 and was completed. *scratches head* Help? Thank you in advance.
FOUND by moonprincessnat -
The Care and Wooing of Tony Stark, Billionaire by AngeNoir
Many, many thanks!
****I don't know why, but for some reason the search: fanart tag got added to this post and it won't let me delete it!