I'm pretty sure I'm overthinking this, but, it's not rude to give a widow a plus one is it?
All of our single guests are getting a plus one, except our 90 year old grandmothers (and really, if they want one they can have one too) and all S.O.s are invited. FH's aunt is a widow. I was planning on giving her a plus one. If it matters, her husband died 10 years ago (I never got to meet him). She wears her wedding and engagement rings every day, and talks about him a lot.
I just wanted to check and make sure people don't think it comes across as "We don't respect the memory of your late husband, bring a date."