Boyfriends ex

I dont know what to do. My boyfriend of 8months has done a dna test with his exs kid and its his!

I love the man and im not bother about him being a dad its the childs mother im more worried about!

She constantly texts him and puts "xx" and also put this morning "cant wait 😍🤞🏻"

I trust him alot but its her and his family that im more worried about and i can see things going down hill!

Am i reading to far into her or am i right in thinking she wants him back!

Please give me advice