Yes you could.

For all instances, the bank will give loans based the lowest of these:

1. valuation as per done verbally by the banks' panel of valuers
2. the booking and/or SPA and/or transfer prices

So in your case, the bank will give 90% of the transfer price. If you put the transfer price as RM110k for example, the loan given would be RM99k.

Since this is a transfer between related parties, the banks financing your loan would probably ask for loan statement of the parent just to see if this is not a "refinancing" of sorts to clear off bad debts

In addition, may I suggest that you buy the house at the market value anyway? This way "your mom" could get to capitalize and borrow more from the bank. Mortgages has the cheapest financing rate a normal citizen, if you miss the opportunity and apply for  a refinancing at a later date, you would have to pay these again:

1. legal ees
2. stamp duty on the legal fees
3. valuation

It means the end financing deal between the bank and the project is not approved yet, so once it's approve, the bank can only proceed with your loan application.

That you will need to ask which stage is the EF process at now with the banker.
You can buy it for 100k from her if she is willing to sell it to you at 100k.

You can arrange SPA based on 111k and get 90% loan which is 100k.

However your stamp duty charges is based on the market price of the property by the land office.

There is a table for that.

1st 100k 1%
100k to 500k 2%
500k and above 3%

You add them up. For exampel 600k property, the fee are 1k + 8k + 3k = 12k