the uke and the seme are stepbrother, the uke is a M and likes to have s*x with multiple people at the same time. And one day the brother(seme) finally found where the uke live, see the scars on the uke body and get mad....Huhu (=・ω・=)
May be this? I’m not sure tho
https://www.mangago.zone/read-manga/shadow_realm/
Seme and the uke meet at a cafe/restaurant, at first they sit on a different table but side by side. The uke was waiting for his "ex bf" after some time, seme found out that the ex got a family (wife/gf and a child).
Sorry my writing is a mess.
Sounds similar to this manga https://www.mangago.zone/read-manga/tonari_no_usotsuki_suzaka_shina/
Yeahhh, thank youuu
Uke and seme "do it" under a blanket, cause got cat watching lol.