If a husband only cheats by making-out, does that counts as an affair?

My friend just found out her husband has cheated 3 months with a co-worker. However, it's confirmed they only made-out. It never went further than that. He never went to a hotel. She still feels betrayed.

Since they got romantically involved (non-sexual), he shared private information with her about his marriage and said deeper things too about having feeling for each other, does that count as an affair?

Or it has to be sexual for it to be an affair?

Yes, it's still an affair
No, an affair has to have sex involved
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If a husband only cheats by making-out, does that counts as an affair?
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