Can my girlfriend get First time buyer bonus if I also put money in? Couldn't work out how to phrase this so appologies for that. Will try to explain.

I currently own a property, however my girlfriend doesn't, we are not engaged or anything. 

She's saved  up £7000  in a LISA  account and found  a house she likes and  is hoping to purchase. The thing I'm  wondering is I am looking to help her  out and have been fortunate enough to have enough for the rest of the house £120,000ish, outright without a mortgage for her. Is there anyway I can pay this for her or would this disqualify her for the first time buyer bonus? 

I also realise this is risky and I will have no legal recourse if we split up.

Thanks in advance.