I see you are a rookie at the incest lingo. I'll help enlighten you son. DxD, better put as D/d is dad with daughter. MxS, also better as M/S is Mum with Son. BxS, better put as B/S is Brother with Sister. And finally, DmD is Dating my Daughter, an OG of incest games that was once great, but turned to crap around part 3 when D started sharing d with other dudes.
And cubba is right, D/d incest is hard to pull off without D looking like a creepy nut job. Picture Perfect and The Guardian did it pretty well though.