Unbelievable! What a "BARE-faced [excuse the pun] cheek" this woman has ... !
If I were you, I'd be inclined to leave things be ... rather than risk bringing yourself down to HER level by creating a big fuss. UNLESS, of course, your boyfriend - covertly or otherwise - decides to take up his ex's offer!
Ohh, I thought this is a common thing for you guys in the UK. I have nothing against that.
I'm not very conservative but I wont ever ask a guy out, more so in public.
I am not saying anything. I think I am getting my boyfriend really worried now.