So me and my sister have been trying for the past few days trying to find this yaoi but have had no luck so far on any of the sites we use. The only thing that was recalled was a scene where the main character is in a playground with his boyfriend (?) and his kid, and the ex-wife of the boyfriend is somehow there as well? Like the divorcees are meeting up, and the main character playing with the child but he's visibly uncomfortable or upset by seeing his boyfriend (?) and ex-wife together and refers to her as his 'wife'.

The divorced couple are sitting on a bench or standing together (something!) talking and the ex-wife asks her ex-husband if he's 'testing' the main character? Or something like that?

That's literally all I can remember from it! Any help would be appreciated because I have been looking through tons of tags with no luck!

I think I've read this one but I can't seem to recall the title. The MC left them at the playground after that right? And were they a kinda manly couple?