If she did that, to wear the handbags, that's extremely gracious. However I wouldn't feel obligated personally towards an ex. Letizia has nothing to make up for, no guilt IMO.
I don't think it has to do with guilt or tryng to make up for anything. If I was secure in my marriage and I genuinely like my husband's ex, why not? Besides, Felipe and Isabel's relationship was over 20 years ago, it's not like she was the last girlfriend before Leti (like Eva). I don't see the problem.Isabel is supposed to have said the following at Pablo of Hohenlohe's wedding party a few years ago: "I'm the only one at this table who's slept with the p---ce". I wonder how much Letizia likes her husband's ex boasting about her sexual past with him.