AF seem to book a lot of connections based on a 45 minute minimum connecting time. You need everything to go right, if you are to make the connection, and there is no margin if you're connecting to the last flight of the day (which you are).
It would have been more comfortable to book the LHR-CDG flight one hour earlier (1915-2125), which would then give you 110 minutes to connect at CDG.
There's not very much you can do about it now, but one thing that might be worth trying is to go to LHR early and ask whether AF might have space to take you on the earlier flight so as to give you a bigger connection time at CDG. Or, even, go and see whether you could get on the 1700 (arr 1910) or the 1800 (arr 2010) - after all, the rest of your family are arriving at CDG at 1925 so you could keep them company by going early. (If you want to, that is ...
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