Me nearly caught caught in a friends mums panties

when i was 19 i was staying at a mums friend of mine andi had been wanking earlier in said black satin panties.later on we went to the pub,now she is hot and 60 ish,i had a pair hold up black stocking under my jeans.when i come back from toilet,she mentioneda pair of panties was missing?i didnt know what to say except?er,no, and then she pulled up her dress showed me sheer brown tights and said?thats a pity.