Add a masturbation schedule. Something that accommodates the kids' schedules and hers but forces her to find a moment that's entirely sexual and by your command.

Whether you make her 'edge' or let her come or demand that she come and within a certain time limit (and variably each day as you wish,) is entirely up to you.

Each day over dinner, she must tell you how she did, whether all tasks were successfully accomplished or not, in double entendre if the kids are present, with foreknowledge of the consequences and rewards to be administered as soon as the kids are excused to play, do homework, or off to bed, as the case may be.