Talking about exes...not good for sex

Ella is an excellent cook, she cooks in an ordinary pub, but her traditional Czech dishes are renowned far and wide. Robert, her married cousin, is also a great cook, has a Michelin star from his time abroad and now cooks in a renowned Prague restaurant. They both have a dream - to have their own restaurant somewhere in the countryside. Their dream comes closer to fruition when, as the only cooks in the family, a distant relative bequeaths them an equal share of a lakeside cruise restaurant. There's a catch - Ella is in love with Robert, but Robert is almost always talking about his wife, who ran off with a stranger.