洋洋得意

I reckon she has good reason to feel smug.

她洋洋得意必有其缘故。

She gloated over her son’s achievements.

她对儿子的成就感到洋洋得意。

Which the elation of liberty and the pain of exclusion were indistinguishably mingled.

她既由而洋洋得意，又因未能加而不胜伤心，两种感情难分难解地纠集在一起。