When my first son did a house share with two other people, we were in the process of moving 550 miles away to another state after a lengthy period of unemployment for my husband.
Oldest son (20) said, "I'm sorry, but I can't go with you. My life is here. And don't worry, I'll finish college."
He worked at a restaurant. He shared a house with 2 other employees. The female was 30.
Was I glad that he chose to share a house with someone who was mature and sensible who could show him the ropes about living independently, and who, with the other housemate, had established chore charts, etc.?
Absolutely.
It saved me many, many sleepless nights....
She was a surrogate big sister, God bless her.
Good housemates come in all genders. I had met his and knew that he would be in a good situation.
Perhaps the fairest thing to say is that, since we don't know the particulars of Cecilia's situation, none of us can say for certain whether it would be good or bad, but that the answer as to whether it is a good decision or not depends on those particulars.
If there are people who are scandalized by what she knows are platonic living arrangements, then the sin is theirs, not Cecilia's (particularly if they spread the "scandal.") Maybe they need to readjust their scandal meters to allow for knowledge of the facts before jumps to inaccurate conclusions.