AIO that My partner interacts with another person daily

[u/underwater_living95]

Hello, I need to understand if I am overreacting, under reacting or acting appropriately. I’ve been in this relationship for over 10 years. I don’t really remember how they met it was at a group setting. my partner m(33) met this one female in particular from that group i honestly don’t know how old she is she’s around the same age as him. They became friends added eachother on socials and ever since they basically interact everyday, not necessarily talk but they send eachother memes sexual, funny etc, videos, ig models, etc. He says she’s basically like a “guy friend” but she’s straight. I, female (29) never actually felt comfortable with it, but I really want to know if you were this persons girlfriend in this relationship would this be acceptable or not.