If she is retired, she might value monogamous relation greatly and by virtue of her experience in this industry, be more confident in her new role, leaving the past aside and moving on, and this can prove to be a valuable partner in marriage…
But for an active SP, it appears as if the odds are not too much favourable to sustain a long term relationship, unless a lot of adjustments are made by each. If both earn well, odds might favour a bit, but if there is a huge gap in earnings, then differences might erupt sooner or later leading to role reversal and ego clashes.