这句话怎么翻译成英语啊

I saw her boyfriend and her going to the mall. They were really happy and romantic, after all they were engaged already.

Yesterday, I saw her and her object to the Store, the two of the year, after all, has been engaged to be affectionate!

Yesterday I had seen her and her marriage partner played the department store , some people very affectionated with own eyes. after all ,they have been engaged already!

I saw with own eyes her to go to a general merchandise mansion with her object yesterday, a pair person was warm and affectionate~have already betrothed after all！

这个哈