Need ideas for correcting players now missing arm.

So they did van ricktens tower this weekend. Blew up esmerelda caravan. Figured out the tower door found the holy symbol of raven kind. Emeralds showed up yelled at them for her caravan but Then the werewolves showed up.

Fight went well mostly. Kiril escaped but the rest of the wolves and such went down. However 3 of the players got bit. Only 1 (my wife) failed her save to get infected. I had them do a medicine roll to figure out if the bite had infected them or not which she passed. The group panicked and decided to chop off her left arm (body parts dice) like how emeralda did her leg.

So now I need to figure out how to play this going forward.

I have a couple thoughts.

1) she's infected cutting it off doesn't affect it. so it grows back overnight or a few days.

2) send her to blinsky to have him make her an arm

3) van rickten just happens to have a magical arm (like esmerelda) that he will part with.

4) she wants "daddy strahd" as she calls him so maybe he comes to her aid in some way?

5) she also tried to date izek so maybe something like his hands happens

6) maybe tell them to go to Krezk because "the Abbot can help" (they haven't been there yet)

7) maybe send her to baba lysaga for help?

8) haven't checked but look at the dark parts and see if one could help/ reach out to her.

Other important info. Irena is being watched by izek and ismark in Vallaki. Strahd has met the PC once at the funeral and seeing my wife's pc threw him off. She's an asimar but looks basically identical to Irena so now strahd isn't sure who he wants more (basically I haven't decided if I want her taking over Irena role. Currently I plan on eventually having strahd kidnap Irena to draw them to the castle but then killing her infront of them and him professing his love for the pc asimar. Also might have one of the bride kill Irena forcing strahd onto the pc.)

Any and all help or ideas welcome