Horses escaping

[1982mommaof4]

We live next to a field where a lady keeps horses. She has been there for years, we have been there for 14. The horses have escaped around 5 times over the 14 years.
We live in a country lane with a sharp bend, so when they are in the road it is dangerous. Those four times the horses have been in our garden and completely ruined our lawn. We have never said anything however fast forward to Thursday ...we heard them in the garden at 3 in the morning. They the left our garden onto the road (8 horses) we contacted 101 due to them being out in the road.
My husband has spoken to the lady today.. she went completely crazy at him, telling us it's our responsibility to keep them out of the garden.. now my husband is fuming and said he wants her to pay for the damage to our garden. My AIBU is to think it's not our responsibility to keep them out?

@Vvvvvvvvv no you don't sound like her at all!!! 😊 ugh I just wanted her to say no problem I'll sort your grass. Instead she has told my husband you can afford it fix it yourself! Happy days! Just want a roast dinner and peace 🙃

As a horse owner myself I can confirm that there are many horse owners who are bonkers

Well If they've come up your driveway after getting on the road then yes I can see her logic that it's up to you to keep them out of your garden, but where her logic falls apart is that it is up to her to keep them in her field in the first place so that they can't get on the road. Sounds like she's taking on more than she can cope with and blaming other people when it goes wrong.