Howard falls head over heels in love with Bob's sister, Ellen. Under most circumstances, Bob would find this perfectly acceptable, except that Ellen is engaged to someone else.
At Jerry's urging, Bob hires a business manager to handle his money. He ends up living on a meager allowance that affords him only such luxuries as peanut butter and jelly sandwiches for lunch.
When Carol's new love interest interferes with her work, Jerry doesn't seem too concerned. But when it disrupts his love life, he decides to fire her.