BA cabin crew have a ‘licence’ and in order to keep it you need to fly every three months I think it is, so it stays valid. From the looks of it, that’s what Michelle is doing.
Also, in reference to previous posts about her getting cheap holidays, as a BA employee she will get one set of very cheap (circa £200pp) flights per year, (called ABC’s), and after that she can fly ‘standby’ where she’ll just pay the taxes. As far as accommodation goes, she will be able to email hotels directly for ‘airline rates’ and also take advantage of crew rates at hotels all over the world. But no, her actual pay isn’t really that great. And would certainly be boosted massively by, I dunno, say £16k from a certain GFM!