The problem with this particular lady and I may be completely wrong but, if you say to her an indoor cat will be okay for her, is she likely to keep it indoors

I rehomed Jack and Toby as indoor cats, although not on a main road, there was one pretty close by and the owners had recently had their other cat disappear. The condition on rehoming was they would be indoor and not let outside. The day after I'd rehomed them, their other cat appeared after being gone for about 8 weeks. Toby was unsettled so I agreed to take him back in the hope that Jack would be okay with theirs. Anyway, things didn't quite work out as Jack wouldn't use the loo for some bizarre reason so I got him back too. When I went to pick him up, after the owners were adamant they were going to keep their other cat in, bearing in mind he'd been back just over a day after 8 weeks missing, I asked where he was and they'd let him out that morning and again he hadn't come back

You have to follow gut feeling as not everyone is truthful when it comes to rehoming, I am sooooooo pleased I got Jack and Tobes back, god knows they would have ended up going outside in no time and the fact they'd let their other out so soon after him returning, proved that.