I recommend this lady not carry a firearm! Someone that feeble is most likely going to get the weapon taken away from her by any self respecting bad guy. I would be surprised if she could hit anything under stress anyway.
IMHO she would be much better off having a can of Saber Red OC spray with a "stream" nozzle to minimize back spray.
And how would this help? Is the new rule that, as we get less able to defend ourselves, we go
down in defensive weapons? Is it less possible that an attacker could disarm her of a chemical weapon than of a firearm?
I have not met this lady, so I would never be so bold as to say "I recommend this lady NOT carry a firearm!" based only on what is provided here. In fact, if she can access a firearm when her home safety is breached, and can present it (and fire it if needed), she is statistically far more likely to emerge from the encounter uninjured or, at least, alive, than if she were to resist through any other means.
I also think that, if she had a semi-auto that she could handle firing, it's not necessary for her to rack the slide provided someone else does it for her, and checks on it from time to time.
I'm guessing the little Beretta she has is a double-action or DA/SA model. I'm also guessing that .22 ammo is all that she wants the recoil of (and I will not disparage that decision either.) Offhand, I don't know what semi-automatic .22 pistols with DA first-shots have the lightest trigger pulls, but I think the Ruger SR-22 is supposed to be reasonably light and crisp. I've heard that also about the Walther.
But, bottom line, I agree that, if she can handle one of the lighter .38 revolvers, both in recoil and trigger pull, it's probably the best way to go. If trigger pull is fine, but not recoil, she can use the Cowboy Action loads, or use one in .22WMR or .22LR.