Question

She will ask her friend to dinner​

Answer 1

Во-первых,

Will she ask her friend for dinner?

Во-вторых,

Я не знаю, пригласит ли "она" своего друга на ужин. Ну, допустим, что да - Yes, she will.

Answer 2

It sounds like you're describing a situation where someone, presumably a woman, plans to invite her friend to dinner. Inviting a friend to dinner is a common social gesture to spend time together and share a meal. If you have any specific questions or need advice on how to go about inviting someone to dinner or any related information, please feel free to ask, and I'll be happy to help.