her next letter , mailed from monte carlo a few weeks later , signaled another change of plans : onassis and callas were apparently seeing eye to eye again , and since callas didnt much care for harriet , and was quite vocal about it , harriet had opted to leave the christina and instead accept an invitation from a sam spiegel , producer of some renown apparently , whose yacht , the malahne , was moored next to mr. onassiss christina .