When Toby went off and got buff without Kate it really seemed to throw her for a loop. Toby’s heart attack and new fatherhood were his motivations, but Kate was hit hard by the change. She seemed insulted, and worried that Toby thought she didn’t care about their son enough to do the same, especially after Toby mentioned wanting to get in shape to be healthy and able to care for Jack. Later, Kate wonders — but only for a brief moment — whether or not Toby's weight loss is affecting his desire towards her (he immediately asserts that it definitely hasn't changed a thing). But through all of these small moments, we are seeing how one partner's body changing can put pressure on a romantic relationship, and the other partner's body image.