I think that how many sexual partners someone has is an entirely subjective matter. If both parties are willing and go about it safely understanding the nature of any potential ongoing relationship then why not? I honestly believe that someone’s sex life is their own private personal business and as long as they are comfortable with their choices there should never be shame attached.
If you’re a gran Shanavine how do you find the time and energy? ? Only advice I have to add is “practice safe sex always”. There are other diseases around, not only Civid-19.