Reading David's post, it made me think, (and it is no reflection on what David said) that there is an assumption that if an unattached woman, especially an older widowed woman, offers any act of friendship or assistance to a man her age, that she is 'after' the man.
My DF was immeasurably helped after he was widowed by the women of a social group my DM belonged to. Most of them happily married, a few widowed. He used to have lunch with one or other every week and drop around for coffee. Nobody who knew them, would ever have suggested that any of them were 'after' him. It was just the hand of support and inclusion within a close social group.
I think if an older woman offers meals and support to a man on his own, it should be interpreted as just that, an offer of company and a meal, by a woman on her own to someone else in that position. No-one makes any comment if she offers that hand of friendship to another woman.