Sorry i been a bit lazy commenting on this season but to be honest i find the show boring i mean after she lost baby you kind of knew things would fall back in place and even her sister told him she doesn't think it will work between them if that didn't put the point across invite his cop partner to thanksgiving certainly put the point across that it won't work.
. Yes i think he will cheat on her with her why else would they introduce her into the series ?.